diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 8f641d683..cb9380c20 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -460,6 +460,10 @@
     "selectAContact": {
       "message": "Select a contact or group to start chatting."
     },
+    "contactAvatarAlt": {
+      "message": "Contact avatar",
+      "description": "Used in the alt tag for the image avatar of a contact"
+    },
     "sendMessageToContact": {
       "message": "Send Message",
       "description": "Shown when you are sent a contact and that contact has a signal account"
@@ -618,6 +622,28 @@
         "message": "Secure session reset",
         "description": "This is a past tense, informational message. In other words, your secure session has been reset."
     },
+    "quoteThumbnailAlt": {
+      "message": "Thumbnail of image from quoted message",
+      "description": "Used in alt tag of thumbnail images inside of an embedded message quote"
+    },
+    "lightboxImageAlt": {
+      "message": "Image sent in conversation",
+      "description": "Used in the alt tag for the image shown in a full-screen lightbox view"
+    },
+    "fileIconAlt": {
+      "message": "File icon",
+      "description": "Used in the media gallery documents tab to visually represent a file"
+    },
+    "emojiAlt": {
+      "message": "Emoji image of '$title$'",
+      "description": "Used in the alt tag of all emoji images",
+      "placeholders": {
+        "title": {
+          "content": "$1",
+          "example": "grinning"
+        }
+      }
+    },
     "noContents": {
         "message": "No message contents",
         "description": "Shown in a message bubble if we have nothing in the message to display, or a quote and nothing else"
diff --git a/package.json b/package.json
index 9d0d193cc..904b7d784 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "jshint": "yarn grunt jshint",
     "lint": "yarn format --list-different && yarn lint-windows",
     "lint-windows": "yarn eslint && yarn grunt lint && yarn tslint",
-    "tslint": "tslint --config tslint.json --format stylish --project .",
+    "tslint": "tslint --format stylish --project .",
     "format": "prettier --write \"*.{css,js,json,md,scss,ts,tsx}\" \"./**/*.{css,js,json,md,scss,ts,tsx}\"",
     "transpile": "tsc",
     "clean-transpile": "rimraf ts/**/*.js ts/*.js",
diff --git a/ts/backbone/views/Lightbox.ts b/ts/backbone/views/Lightbox.ts
index b245e5253..011fec513 100644
--- a/ts/backbone/views/Lightbox.ts
+++ b/ts/backbone/views/Lightbox.ts
@@ -5,6 +5,7 @@ export const show = (element: HTMLElement): void => {
   if (container === null) {
     throw new TypeError("'.lightbox-container' is required");
   }
+  // tslint:disable-next-line:no-inner-html
   container.innerHTML = '';
   container.style.display = 'block';
   container.appendChild(element);
@@ -17,6 +18,7 @@ export const hide = (): void => {
   if (container === null) {
     return;
   }
+  // tslint:disable-next-line:no-inner-html
   container.innerHTML = '';
   container.style.display = 'none';
 };
diff --git a/ts/components/Lightbox.md b/ts/components/Lightbox.md
index 0840244f1..b776e5750 100644
--- a/ts/components/Lightbox.md
+++ b/ts/components/Lightbox.md
@@ -8,6 +8,7 @@ const noop = () => {};
     objectURL="https://placekitten.com/800/600"
     contentType="image/jpeg"
     onSave={noop}
+    i18n={util.i18n}
   />
 </div>;
 ```
@@ -18,7 +19,12 @@ const noop = () => {};
 const noop = () => {};
 
 <div style={{ position: 'relative', width: '100%', height: 500 }}>
-  <Lightbox objectURL="foo.tif" contentType="image/tiff" onSave={noop} />
+  <Lightbox
+    objectURL="foo.tif"
+    contentType="image/tiff"
+    onSave={noop}
+    i18n={util.i18n}
+  />
 </div>;
 ```
 
@@ -32,6 +38,7 @@ const noop = () => {};
     objectURL="fixtures/pixabay-Soap-Bubble-7141.mp4"
     contentType="video/mp4"
     onSave={noop}
+    i18n={util.i18n}
   />
 </div>;
 ```
@@ -42,7 +49,12 @@ const noop = () => {};
 const noop = () => {};
 
 <div style={{ position: 'relative', width: '100%', height: 500 }}>
-  <Lightbox objectURL="foo.mov" contentType="video/quicktime" onSave={noop} />
+  <Lightbox
+    objectURL="foo.mov"
+    contentType="video/quicktime"
+    onSave={noop}
+    i18n={util.i18n}
+  />
 </div>;
 ```
 
@@ -56,6 +68,7 @@ const noop = () => {};
     objectURL="tsconfig.json"
     contentType="application/json"
     onSave={noop}
+    i18n={util.i18n}
   />
 </div>;
 ```
diff --git a/ts/components/Lightbox.tsx b/ts/components/Lightbox.tsx
index 73a8ebf7e..33f0bd55f 100644
--- a/ts/components/Lightbox.tsx
+++ b/ts/components/Lightbox.tsx
@@ -1,3 +1,5 @@
+// tslint:disable:react-a11y-anchors
+
 import React from 'react';
 
 import classNames from 'classnames';
@@ -8,10 +10,13 @@ import * as GoogleChrome from '../util/GoogleChrome';
 import * as MIME from '../types/MIME';
 import { colorSVG } from '../styles/colorSVG';
 
+import { Localizer } from '../types/Util';
+
 interface Props {
   close: () => void;
-  objectURL: string;
   contentType: MIME.MIMEType | undefined;
+  i18n: Localizer;
+  objectURL: string;
   onNext?: () => void;
   onPrevious?: () => void;
   onSave?: () => void;
@@ -103,6 +108,7 @@ const IconButton = ({ onClick, style, type }: IconButtonProps) => {
       href="#"
       onClick={clickHandler}
       className={classNames('iconButton', type)}
+      role="button"
       style={style}
     />
   );
@@ -128,10 +134,11 @@ const Icon = ({
       maxWidth: 200,
     }}
     onClick={onClick}
+    role="button"
   />
 );
 
-export class Lightbox extends React.Component<Props, {}> {
+export class Lightbox extends React.Component<Props> {
   private containerRef: HTMLDivElement | null = null;
 
   public componentDidMount() {
@@ -145,18 +152,27 @@ export class Lightbox extends React.Component<Props, {}> {
   }
 
   public render() {
-    const { contentType, objectURL, onNext, onPrevious, onSave } = this.props;
+    const {
+      contentType,
+      objectURL,
+      onNext,
+      onPrevious,
+      onSave,
+      i18n,
+    } = this.props;
+
     return (
       <div
         style={styles.container}
         onClick={this.onContainerClick}
         ref={this.setContainerRef}
+        role="dialog"
       >
         <div style={styles.mainContainer}>
           <div style={styles.controlsOffsetPlaceholder} />
           <div style={styles.objectContainer}>
             {!is.undefined(contentType)
-              ? this.renderObject({ objectURL, contentType })
+              ? this.renderObject({ objectURL, contentType, i18n })
               : null}
           </div>
           <div style={styles.controls}>
@@ -189,14 +205,17 @@ export class Lightbox extends React.Component<Props, {}> {
   private renderObject = ({
     objectURL,
     contentType,
+    i18n,
   }: {
     objectURL: string;
     contentType: MIME.MIMEType;
+    i18n: Localizer;
   }) => {
     const isImageTypeSupported = GoogleChrome.isImageTypeSupported(contentType);
     if (isImageTypeSupported) {
       return (
         <img
+          alt={i18n('lightboxImageAlt')}
           style={styles.object}
           src={objectURL}
           onClick={this.onObjectClick}
@@ -228,6 +247,7 @@ export class Lightbox extends React.Component<Props, {}> {
 
     // tslint:disable-next-line no-console
     console.log('Lightbox: Unexpected content type', { contentType });
+
     return <Icon onClick={this.onObjectClick} url="images/file.svg" />;
   };
 
@@ -245,11 +265,10 @@ export class Lightbox extends React.Component<Props, {}> {
   };
 
   private onKeyUp = (event: KeyboardEvent) => {
-    const { onClose } = this;
     const { onNext, onPrevious } = this.props;
     switch (event.key) {
       case 'Escape':
-        onClose();
+        this.onClose();
         break;
 
       case 'ArrowLeft':
@@ -265,7 +284,6 @@ export class Lightbox extends React.Component<Props, {}> {
         break;
 
       default:
-        break;
     }
   };
 
diff --git a/ts/components/LightboxGallery.md b/ts/components/LightboxGallery.md
index 4c5f71063..7fff37fca 100644
--- a/ts/components/LightboxGallery.md
+++ b/ts/components/LightboxGallery.md
@@ -33,6 +33,6 @@ const messages = [
 ];
 
 <div style={{ position: 'relative', width: '100%', height: 500 }}>
-  <LightboxGallery messages={messages} onSave={noop} />
+  <LightboxGallery messages={messages} onSave={noop} i18n={util.i18n} />
 </div>;
 ```
diff --git a/ts/components/LightboxGallery.tsx b/ts/components/LightboxGallery.tsx
index 39b7b4eb0..7d83c3492 100644
--- a/ts/components/LightboxGallery.tsx
+++ b/ts/components/LightboxGallery.tsx
@@ -7,6 +7,8 @@ import * as MIME from '../types/MIME';
 import { Lightbox } from './Lightbox';
 import { Message } from './conversation/media-gallery/types/Message';
 
+import { Localizer } from '../types/Util';
+
 interface Item {
   objectURL?: string;
   contentType: MIME.MIMEType | undefined;
@@ -14,6 +16,7 @@ interface Item {
 
 interface Props {
   close: () => void;
+  i18n: Localizer;
   messages: Array<Message>;
   onSave?: ({ message }: { message: Message }) => void;
   selectedIndex: number;
@@ -42,7 +45,7 @@ export class LightboxGallery extends React.Component<Props, State> {
   }
 
   public render() {
-    const { close, messages, onSave } = this.props;
+    const { close, messages, onSave, i18n } = this.props;
     const { selectedIndex } = this.state;
 
     const selectedMessage: Message = messages[selectedIndex];
@@ -65,6 +68,7 @@ export class LightboxGallery extends React.Component<Props, State> {
         onSave={onSave ? this.handleSave : undefined}
         objectURL={objectURL}
         contentType={selectedItem.contentType}
+        i18n={i18n}
       />
     );
   }
diff --git a/ts/components/conversation/AddNewLines.tsx b/ts/components/conversation/AddNewLines.tsx
index b4bdfe135..12996d059 100644
--- a/ts/components/conversation/AddNewLines.tsx
+++ b/ts/components/conversation/AddNewLines.tsx
@@ -8,7 +8,7 @@ interface Props {
   renderNonNewLine?: RenderTextCallback;
 }
 
-export class AddNewLines extends React.Component<Props, {}> {
+export class AddNewLines extends React.Component<Props> {
   public static defaultProps: Partial<Props> = {
     renderNonNewLine: ({ text, key }) => <span key={key}>{text}</span>,
   };
diff --git a/ts/components/conversation/ContactDetail.tsx b/ts/components/conversation/ContactDetail.tsx
index 1ea63b65a..fced9c340 100644
--- a/ts/components/conversation/ContactDetail.tsx
+++ b/ts/components/conversation/ContactDetail.tsx
@@ -69,7 +69,7 @@ function getLabelForAddress(address: PostalAddress, i18n: Localizer): string {
   }
 }
 
-export class ContactDetail extends React.Component<Props, {}> {
+export class ContactDetail extends React.Component<Props> {
   public renderEmail(items: Array<Email> | undefined, i18n: Localizer) {
     if (!items || items.length === 0) {
       return;
@@ -159,7 +159,7 @@ export class ContactDetail extends React.Component<Props, {}> {
 
     return (
       <div className="contact-detail">
-        {renderAvatar(contact)}
+        {renderAvatar(contact, i18n)}
         {renderName(contact)}
         {renderContactShorthand(contact)}
         {renderSendMessage({ hasSignalAccount, i18n, onSendMessage })}
diff --git a/ts/components/conversation/ContactName.tsx b/ts/components/conversation/ContactName.tsx
index d73df7c06..880d86506 100644
--- a/ts/components/conversation/ContactName.tsx
+++ b/ts/components/conversation/ContactName.tsx
@@ -2,27 +2,30 @@ import React from 'react';
 
 import { Emojify } from './Emojify';
 
+import { Localizer } from '../../types/Util';
+
 interface Props {
   phoneNumber: string;
   name?: string;
   profileName?: string;
+  i18n: Localizer;
 }
 
-export class ContactName extends React.Component<Props, {}> {
+export class ContactName extends React.Component<Props> {
   public render() {
-    const { phoneNumber, name, profileName } = this.props;
+    const { phoneNumber, name, profileName, i18n } = this.props;
 
     const title = name ? name : phoneNumber;
     const profileElement =
       profileName && !name ? (
         <span className="profile-name">
-          ~<Emojify text={profileName} />
+          ~<Emojify text={profileName} i18n={i18n} />
         </span>
       ) : null;
 
     return (
       <span>
-        <Emojify text={title} /> {profileElement}
+        <Emojify text={title} i18n={i18n} /> {profileElement}
       </span>
     );
   }
diff --git a/ts/components/conversation/ConversationTitle.tsx b/ts/components/conversation/ConversationTitle.tsx
index 7cf6ee941..905435fea 100644
--- a/ts/components/conversation/ConversationTitle.tsx
+++ b/ts/components/conversation/ConversationTitle.tsx
@@ -11,7 +11,7 @@ interface Props {
   profileName?: string;
 }
 
-export class ConversationTitle extends React.Component<Props, {}> {
+export class ConversationTitle extends React.Component<Props> {
   public render() {
     const { name, phoneNumber, i18n, profileName, isVerified } = this.props;
 
@@ -19,7 +19,7 @@ export class ConversationTitle extends React.Component<Props, {}> {
       <span className="conversation-title">
         {name ? (
           <span className="conversation-name" dir="auto">
-            <Emojify text={name} />
+            <Emojify text={name} i18n={i18n} />
           </span>
         ) : null}
         {phoneNumber ? (
@@ -27,7 +27,7 @@ export class ConversationTitle extends React.Component<Props, {}> {
         ) : null}{' '}
         {profileName ? (
           <span className="profileName">
-            <Emojify text={profileName} />
+            <Emojify text={profileName} i18n={i18n} />
           </span>
         ) : null}
         {isVerified ? (
diff --git a/ts/components/conversation/EmbeddedContact.tsx b/ts/components/conversation/EmbeddedContact.tsx
index 2c2246e99..d6d788c7d 100644
--- a/ts/components/conversation/EmbeddedContact.tsx
+++ b/ts/components/conversation/EmbeddedContact.tsx
@@ -1,15 +1,17 @@
 import React from 'react';
 import { Contact, getName } from '../../types/Contact';
 
+import { Localizer } from '../../types/Util';
+
 interface Props {
   contact: Contact;
   hasSignalAccount: boolean;
-  i18n: (key: string, values?: Array<string>) => string;
+  i18n: Localizer;
   onSendMessage: () => void;
   onOpenContact: () => void;
 }
 
-export class EmbeddedContact extends React.Component<Props, {}> {
+export class EmbeddedContact extends React.Component<Props> {
   public render() {
     const {
       contact,
@@ -20,9 +22,9 @@ export class EmbeddedContact extends React.Component<Props, {}> {
     } = this.props;
 
     return (
-      <div className="embedded-contact" onClick={onOpenContact}>
+      <div className="embedded-contact" role="button" onClick={onOpenContact}>
         <div className="first-line">
-          {renderAvatar(contact)}
+          {renderAvatar(contact, i18n)}
           <div className="text-container">
             {renderName(contact)}
             {renderContactShorthand(contact)}
@@ -40,13 +42,14 @@ function getInitials(name: string): string {
   return name.trim()[0] || '#';
 }
 
-export function renderAvatar(contact: Contact) {
+export function renderAvatar(contact: Contact, i18n: Localizer) {
   const { avatar } = contact;
 
   const path = avatar && avatar.avatar && avatar.avatar.path;
   if (!path) {
     const name = getName(contact);
     const initials = getInitials(name || '');
+
     return (
       <div className="image-container">
         <div className="default-avatar">{initials}</div>
@@ -56,7 +59,7 @@ export function renderAvatar(contact: Contact) {
 
   return (
     <div className="image-container">
-      <img src={path} />
+      <img src={path} alt={i18n('contactAvatarAlt')} />
     </div>
   );
 }
@@ -92,7 +95,7 @@ export function renderSendMessage(props: {
   };
 
   return (
-    <div className="send-message" onClick={onClick}>
+    <div className="send-message" role="button" onClick={onClick}>
       <button className="inner">
         <div className="icon bubble-icon" />
         {i18n('sendMessageToContact')}
diff --git a/ts/components/conversation/Emojify.md b/ts/components/conversation/Emojify.md
index 17e2c9e1a..386db385d 100644
--- a/ts/components/conversation/Emojify.md
+++ b/ts/components/conversation/Emojify.md
@@ -1,53 +1,53 @@
 ### All emoji
 
 ```jsx
-<Emojify text="🔥🔥🔥" />
+<Emojify text="🔥🔥🔥" i18n={util.i18n} />
 ```
 
 ### With skin color modifier
 
 ```jsx
-<Emojify text="👍🏾" />
+<Emojify text="👍🏾" i18n={util.i18n} />
 ```
 
 ### With `sizeClass` provided
 
 ```jsx
-<Emojify text="🔥" sizeClass="jumbo" />
+<Emojify text="🔥" sizeClass="jumbo" i18n={util.i18n} />
 ```
 
 ```jsx
-<Emojify text="🔥" sizeClass="large" />
+<Emojify text="🔥" sizeClass="large" i18n={util.i18n} />
 ```
 
 ```jsx
-<Emojify text="🔥" sizeClass="medium" />
+<Emojify text="🔥" sizeClass="medium" i18n={util.i18n} />
 ```
 
 ```jsx
-<Emojify text="🔥" sizeClass="small" />
+<Emojify text="🔥" sizeClass="small" i18n={util.i18n} />
 ```
 
 ```jsx
-<Emojify text="🔥" sizeClass="" />
+<Emojify text="🔥" sizeClass="" i18n={util.i18n} />
 ```
 
 ### Starting and ending with emoji
 
 ```jsx
-<Emojify text="🔥in between🔥" />
+<Emojify text="🔥in between🔥" i18n={util.i18n} />
 ```
 
 ### With emoji in the middle
 
 ```jsx
-<Emojify text="Before 🔥🔥 after" />
+<Emojify text="Before 🔥🔥 after" i18n={util.i18n} />
 ```
 
 ### No emoji
 
 ```jsx
-<Emojify text="This is the text" />
+<Emojify text="This is the text" i18n={util.i18n} />
 ```
 
 ### Providing custom non-link render function
@@ -56,5 +56,9 @@
 const renderNonEmoji = ({ text, key }) => (
   <span key={key}>This is my custom content</span>
 );
-<Emojify text="Before 🔥🔥 after" renderNonEmoji={renderNonEmoji} />;
+<Emojify
+  text="Before 🔥🔥 after"
+  renderNonEmoji={renderNonEmoji}
+  i18n={util.i18n}
+/>;
 ```
diff --git a/ts/components/conversation/Emojify.tsx b/ts/components/conversation/Emojify.tsx
index 591b30522..841be0a64 100644
--- a/ts/components/conversation/Emojify.tsx
+++ b/ts/components/conversation/Emojify.tsx
@@ -1,6 +1,6 @@
 import React from 'react';
 
-import classnames from 'classnames';
+import classNames from 'classnames';
 import is from '@sindresorhus/is';
 
 import {
@@ -10,17 +10,19 @@ import {
   getTitle,
 } from '../../util/emoji';
 
-import { RenderTextCallback } from '../../types/Util';
+import { Localizer, RenderTextCallback } from '../../types/Util';
 
 // Some of this logic taken from emoji-js/replacement
 function getImageTag({
   match,
   sizeClass,
   key,
+  i18n,
 }: {
   match: any;
   sizeClass: string | undefined;
   key: string | number;
+  i18n: Localizer;
 }) {
   const result = getReplacementData(match[0], match[1], match[2]);
 
@@ -35,7 +37,8 @@ function getImageTag({
     <img
       key={key}
       src={img.path}
-      className={classnames('emoji', sizeClass)}
+      alt={i18n('emojiAlt', [title || ''])}
+      className={classNames('emoji', sizeClass)}
       data-codepoints={img.full_idx}
       title={`:${title}:`}
     />
@@ -48,15 +51,16 @@ interface Props {
   sizeClass?: '' | 'small' | 'medium' | 'large' | 'jumbo';
   /** Allows you to customize now non-newlines are rendered. Simplest is just a <span>. */
   renderNonEmoji?: RenderTextCallback;
+  i18n: Localizer;
 }
 
-export class Emojify extends React.Component<Props, {}> {
+export class Emojify extends React.Component<Props> {
   public static defaultProps: Partial<Props> = {
     renderNonEmoji: ({ text, key }) => <span key={key}>{text}</span>,
   };
 
   public render() {
-    const { text, sizeClass, renderNonEmoji } = this.props;
+    const { text, sizeClass, renderNonEmoji, i18n } = this.props;
     const results: Array<any> = [];
     const regex = getRegex();
 
@@ -80,7 +84,7 @@ export class Emojify extends React.Component<Props, {}> {
         results.push(renderNonEmoji({ text: textWithNoEmoji, key: count++ }));
       }
 
-      results.push(getImageTag({ match, sizeClass, key: count++ }));
+      results.push(getImageTag({ match, sizeClass, key: count++, i18n }));
 
       last = regex.lastIndex;
       match = regex.exec(text);
diff --git a/ts/components/conversation/Linkify.tsx b/ts/components/conversation/Linkify.tsx
index bc5217e02..41fa6293f 100644
--- a/ts/components/conversation/Linkify.tsx
+++ b/ts/components/conversation/Linkify.tsx
@@ -1,10 +1,10 @@
 import React from 'react';
 
-import createLinkify from 'linkify-it';
+import LinkifyIt from 'linkify-it';
 
 import { RenderTextCallback } from '../../types/Util';
 
-const linkify = createLinkify();
+const linkify = LinkifyIt();
 
 interface Props {
   text: string;
@@ -14,7 +14,7 @@ interface Props {
 
 const SUPPORTED_PROTOCOLS = /^(http|https):/i;
 
-export class Linkify extends React.Component<Props, {}> {
+export class Linkify extends React.Component<Props> {
   public static defaultProps: Partial<Props> = {
     renderNonLink: ({ text, key }) => <span key={key}>{text}</span>,
   };
diff --git a/ts/components/conversation/Message.tsx b/ts/components/conversation/Message.tsx
index 6a9407715..e272c3409 100644
--- a/ts/components/conversation/Message.tsx
+++ b/ts/components/conversation/Message.tsx
@@ -1,3 +1,5 @@
+// tslint:disable:newline-before-return
+
 import React from 'react';
 
 /**
@@ -5,7 +7,7 @@ import React from 'react';
  * none of the dynamic functionality. This page will be used to build up our corpus of
  * permutations before we start moving all message functionality to React.
  */
-export class Message extends React.Component<{}, {}> {
+export class Message extends React.Component {
   public render() {
     return (
       <li className="entry outgoing sent delivered">
diff --git a/ts/components/conversation/MessageBody.md b/ts/components/conversation/MessageBody.md
index 8c1f36349..ce568c81e 100644
--- a/ts/components/conversation/MessageBody.md
+++ b/ts/components/conversation/MessageBody.md
@@ -1,43 +1,46 @@
 ### All components: emoji, links, newline
 
 ```jsx
-<MessageBody text="Fire 🔥 http://somewhere.com\nSecond Line" />
+<MessageBody
+  text="Fire 🔥 http://somewhere.com\nSecond Line"
+  i18n={util.i18n}
+/>
 ```
 
 ### Jumbo emoji
 
 ```jsx
-<MessageBody text="🔥" />
+<MessageBody text="🔥" i18n={util.i18n} />
 ```
 
 ```jsx
-<MessageBody text="🔥🔥" />
+<MessageBody text="🔥🔥" i18n={util.i18n} />
 ```
 
 ```jsx
-<MessageBody text="🔥🔥🔥🔥" />
+<MessageBody text="🔥🔥🔥🔥" i18n={util.i18n} />
 ```
 
 ```jsx
-<MessageBody text="🔥🔥🔥🔥🔥🔥🔥🔥" />
+<MessageBody text="🔥🔥🔥🔥🔥🔥🔥🔥" i18n={util.i18n} />
 ```
 
 ```jsx
-<MessageBody text="🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥" />
+<MessageBody text="🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥🔥" i18n={util.i18n} />
 ```
 
 ```jsx
-<MessageBody text="🔥 text disables jumbomoji" />
+<MessageBody text="🔥 text disables jumbomoji" i18n={util.i18n} />
 ```
 
 ### Jumbomoji disabled
 
 ```jsx
-<MessageBody text="🔥" disableJumbomoji />
+<MessageBody text="🔥" disableJumbomoji i18n={util.i18n} />
 ```
 
 ### Links disabled
 
 ```jsx
-<MessageBody text="http://somewhere.com" disableLinks />
+<MessageBody text="http://somewhere.com" disableLinks i18n={util.i18n} />
 ```
diff --git a/ts/components/conversation/MessageBody.tsx b/ts/components/conversation/MessageBody.tsx
index 058c79368..24f99c3ee 100644
--- a/ts/components/conversation/MessageBody.tsx
+++ b/ts/components/conversation/MessageBody.tsx
@@ -5,7 +5,7 @@ import { Emojify } from './Emojify';
 import { AddNewLines } from './AddNewLines';
 import { Linkify } from './Linkify';
 
-import { RenderTextCallback } from '../../types/Util';
+import { Localizer, RenderTextCallback } from '../../types/Util';
 
 interface Props {
   text: string;
@@ -13,6 +13,7 @@ interface Props {
   disableJumbomoji?: boolean;
   /** If set, links will be left alone instead of turned into clickable `<a>` tags. */
   disableLinks?: boolean;
+  i18n: Localizer;
 }
 
 const renderNewLines: RenderTextCallback = ({
@@ -30,9 +31,9 @@ const renderLinks: RenderTextCallback = ({ text: textWithLinks, key }) => (
  * configurable with their `renderXXX` props, this component will assemble all three of
  * them for you.
  */
-export class MessageBody extends React.Component<Props, {}> {
+export class MessageBody extends React.Component<Props> {
   public render() {
-    const { text, disableJumbomoji, disableLinks } = this.props;
+    const { text, disableJumbomoji, disableLinks, i18n } = this.props;
     const sizeClass = disableJumbomoji ? '' : getSizeClass(text);
 
     return (
@@ -40,6 +41,7 @@ export class MessageBody extends React.Component<Props, {}> {
         text={text}
         sizeClass={sizeClass}
         renderNonEmoji={disableLinks ? renderNewLines : renderLinks}
+        i18n={i18n}
       />
     );
   }
diff --git a/ts/components/conversation/Quote.tsx b/ts/components/conversation/Quote.tsx
index b20ae7c31..bb86cf9c4 100644
--- a/ts/components/conversation/Quote.tsx
+++ b/ts/components/conversation/Quote.tsx
@@ -1,18 +1,21 @@
+// tslint:disable:react-this-binding-issue
+
 import React from 'react';
-import classnames from 'classnames';
+import classNames from 'classnames';
 
 import * as MIME from '../../../ts/types/MIME';
 import * as GoogleChrome from '../../../ts/util/GoogleChrome';
 
 import { Emojify } from './Emojify';
 import { MessageBody } from './MessageBody';
+import { Localizer } from '../../types/Util';
 
 interface Props {
   attachments: Array<QuotedAttachment>;
   authorColor: string;
   authorProfileName?: string;
   authorTitle: string;
-  i18n: (key: string, values?: Array<string>) => string;
+  i18n: Localizer;
   isFromMe: string;
   isIncoming: boolean;
   onClick?: () => void;
@@ -23,14 +26,14 @@ interface Props {
 interface QuotedAttachment {
   contentType: MIME.MIMEType;
   fileName: string;
-  /* Not included in protobuf */
+  /** Not included in protobuf */
   isVoiceMessage: boolean;
   thumbnail?: Attachment;
 }
 
 interface Attachment {
   contentType: MIME.MIMEType;
-  /* Not included in protobuf, and is loaded asynchronously */
+  /** Not included in protobuf, and is loaded asynchronously */
   objectUrl?: string;
 }
 
@@ -54,16 +57,16 @@ function getObjectUrl(thumbnail: Attachment | undefined): string | null {
   return null;
 }
 
-export class Quote extends React.Component<Props, {}> {
-  public renderImage(url: string, icon?: string) {
+export class Quote extends React.Component<Props> {
+  public renderImage(url: string, i18n: Localizer, icon?: string) {
     const iconElement = icon ? (
-      <div className={classnames('icon', 'with-image', icon)} />
+      <div className={classNames('icon', 'with-image', icon)} />
     ) : null;
 
     return (
       <div className="icon-container">
         <div className="inner">
-          <img src={url} />
+          <img src={url} alt={i18n('quoteThumbnailAlt')} />
           {iconElement}
         </div>
       </div>
@@ -78,14 +81,14 @@ export class Quote extends React.Component<Props, {}> {
 
     return (
       <div className="icon-container">
-        <div className={classnames('circle-background', backgroundColor)} />
-        <div className={classnames('icon', icon, iconColor)} />
+        <div className={classNames('circle-background', backgroundColor)} />
+        <div className={classNames('icon', icon, iconColor)} />
       </div>
     );
   }
 
   public renderIconContainer() {
-    const { attachments } = this.props;
+    const { attachments, i18n } = this.props;
     if (!attachments || attachments.length === 0) {
       return null;
     }
@@ -96,11 +99,13 @@ export class Quote extends React.Component<Props, {}> {
 
     if (GoogleChrome.isVideoTypeSupported(contentType)) {
       return objectUrl
-        ? this.renderImage(objectUrl, 'play')
+        ? this.renderImage(objectUrl, i18n, 'play')
         : this.renderIcon('movie');
     }
     if (GoogleChrome.isImageTypeSupported(contentType)) {
-      return objectUrl ? this.renderImage(objectUrl) : this.renderIcon('image');
+      return objectUrl
+        ? this.renderImage(objectUrl, i18n)
+        : this.renderIcon('image');
     }
     if (MIME.isAudio(contentType)) {
       return this.renderIcon('microphone');
@@ -115,7 +120,7 @@ export class Quote extends React.Component<Props, {}> {
     if (text) {
       return (
         <div className="text">
-          <MessageBody text={text} />
+          <MessageBody text={text} i18n={i18n} />
         </div>
       );
     }
@@ -181,7 +186,7 @@ export class Quote extends React.Component<Props, {}> {
     // We need the container to give us the flexibility to implement the iOS design.
     return (
       <div className="close-container">
-        <div className="close-button" onClick={onClick} />
+        <div className="close-button" role="button" onClick={onClick} />
       </div>
     );
   }
@@ -197,17 +202,17 @@ export class Quote extends React.Component<Props, {}> {
 
     const authorProfileElement = authorProfileName ? (
       <span className="profile-name">
-        ~<Emojify text={authorProfileName} />
+        ~<Emojify text={authorProfileName} i18n={i18n} />
       </span>
     ) : null;
 
     return (
-      <div className={classnames(authorColor, 'author')}>
+      <div className={classNames(authorColor, 'author')}>
         {isFromMe ? (
           i18n('you')
         ) : (
           <span>
-            <Emojify text={authorTitle} /> {authorProfileElement}
+            <Emojify text={authorTitle} i18n={i18n} /> {authorProfileElement}
           </span>
         )}
       </div>
@@ -221,7 +226,7 @@ export class Quote extends React.Component<Props, {}> {
       return null;
     }
 
-    const classes = classnames(
+    const classes = classNames(
       authorColor,
       'quoted-message',
       isFromMe ? 'from-me' : null,
@@ -229,7 +234,7 @@ export class Quote extends React.Component<Props, {}> {
     );
 
     return (
-      <div onClick={onClick} className={classes}>
+      <div onClick={onClick} role="button" className={classes}>
         <div className="primary">
           {this.renderIOSLabel()}
           {this.renderAuthor()}
diff --git a/ts/components/conversation/media-gallery/AttachmentSection.md b/ts/components/conversation/media-gallery/AttachmentSection.md
index 56b0a344c..c590cc916 100644
--- a/ts/components/conversation/media-gallery/AttachmentSection.md
+++ b/ts/components/conversation/media-gallery/AttachmentSection.md
@@ -20,5 +20,10 @@ const messages = [
   },
 ];
 
-<AttachmentSection header="Today" type="documents" messages={messages} />;
+<AttachmentSection
+  header="Today"
+  type="documents"
+  messages={messages}
+  i18n={util.i18n}
+/>;
 ```
diff --git a/ts/components/conversation/media-gallery/AttachmentSection.tsx b/ts/components/conversation/media-gallery/AttachmentSection.tsx
index 521c92911..07a07ff52 100644
--- a/ts/components/conversation/media-gallery/AttachmentSection.tsx
+++ b/ts/components/conversation/media-gallery/AttachmentSection.tsx
@@ -33,7 +33,7 @@ interface Props {
   onItemClick?: (event: ItemClickEvent) => void;
 }
 
-export class AttachmentSection extends React.Component<Props, {}> {
+export class AttachmentSection extends React.Component<Props> {
   public render() {
     const { header } = this.props;
 
diff --git a/ts/components/conversation/media-gallery/DocumentListItem.md b/ts/components/conversation/media-gallery/DocumentListItem.md
index d247c20e5..420c688dc 100644
--- a/ts/components/conversation/media-gallery/DocumentListItem.md
+++ b/ts/components/conversation/media-gallery/DocumentListItem.md
@@ -4,17 +4,20 @@
     fileName="meow.jpg"
     fileSize={1024 * 1000 * 2}
     timestamp={Date.now()}
+    i18n={util.i18n}
   />
   <DocumentListItem
     fileName="rickroll.wmv"
     fileSize={1024 * 1000 * 8}
     timestamp={Date.now() - 24 * 60 * 1000}
+    i18n={util.i18n}
   />
   <DocumentListItem
     fileName="kitten.gif"
     fileSize={1024 * 1000 * 1.2}
     timestamp={Date.now() - 14 * 24 * 60 * 1000}
     shouldShowSeparator={false}
+    i18n={util.i18n}
   />
 </div>
 ```
diff --git a/ts/components/conversation/media-gallery/DocumentListItem.tsx b/ts/components/conversation/media-gallery/DocumentListItem.tsx
index 3c75e2a50..660e54cd2 100644
--- a/ts/components/conversation/media-gallery/DocumentListItem.tsx
+++ b/ts/components/conversation/media-gallery/DocumentListItem.tsx
@@ -1,11 +1,14 @@
 import React from 'react';
 
 import moment from 'moment';
+// tslint:disable-next-line:match-default-export-name
 import formatFileSize from 'filesize';
 
+import { Localizer } from '../../../types/Util';
+
 interface Props {
   // Required
-  i18n: (key: string, values?: Array<string>) => string;
+  i18n: Localizer;
   timestamp: number;
 
   // Optional
@@ -58,13 +61,14 @@ const styles = {
   },
 };
 
-export class DocumentListItem extends React.Component<Props, {}> {
+export class DocumentListItem extends React.Component<Props> {
   public static defaultProps: Partial<Props> = {
     shouldShowSeparator: true,
   };
 
   public render() {
     const { shouldShowSeparator } = this.props;
+
     return (
       <div
         style={{
@@ -78,11 +82,16 @@ export class DocumentListItem extends React.Component<Props, {}> {
   }
 
   private renderContent() {
-    const { fileName, fileSize, timestamp } = this.props;
+    const { fileName, fileSize, timestamp, i18n } = this.props;
 
     return (
-      <div style={styles.itemContainer} onClick={this.props.onClick}>
+      <div
+        style={styles.itemContainer}
+        role="button"
+        onClick={this.props.onClick}
+      >
         <img
+          alt={i18n('fileIconAlt')}
           src="images/file.svg"
           width="48"
           height="48"
diff --git a/ts/components/conversation/media-gallery/EmptyState.tsx b/ts/components/conversation/media-gallery/EmptyState.tsx
index 17af20677..90adeb529 100644
--- a/ts/components/conversation/media-gallery/EmptyState.tsx
+++ b/ts/components/conversation/media-gallery/EmptyState.tsx
@@ -21,9 +21,10 @@ const styles = {
   } as React.CSSProperties,
 };
 
-export class EmptyState extends React.Component<Props, {}> {
+export class EmptyState extends React.Component<Props> {
   public render() {
     const { label } = this.props;
+
     return <div style={styles.container}>{label}</div>;
   }
 }
diff --git a/ts/components/conversation/media-gallery/MediaGallery.md b/ts/components/conversation/media-gallery/MediaGallery.md
index 6a41ff7e2..f0845e789 100644
--- a/ts/components/conversation/media-gallery/MediaGallery.md
+++ b/ts/components/conversation/media-gallery/MediaGallery.md
@@ -6,6 +6,7 @@
     i18n={window.i18n}
     media={[]}
     documents={[]}
+    i18n={util.i18n}
   />
 </div>
 ```
@@ -72,7 +73,7 @@ const messages = _.sortBy(
   message => -message.received_at
 );
 
-<MediaGallery i18n={window.i18n} media={messages} documents={messages} />;
+<MediaGallery i18n={util.i18n} media={messages} documents={messages} />;
 ```
 
 ## Media gallery with one document
@@ -83,5 +84,5 @@ const messages = [
     attachments: [{ fileName: 'foo.jpg', contentType: 'application/json' }],
   },
 ];
-<MediaGallery i18n={window.i18n} media={messages} documents={messages} />;
+<MediaGallery i18n={util.i18n} media={messages} documents={messages} />;
 ```
diff --git a/ts/components/conversation/media-gallery/MediaGallery.tsx b/ts/components/conversation/media-gallery/MediaGallery.tsx
index c28a7db88..12bfe1546 100644
--- a/ts/components/conversation/media-gallery/MediaGallery.tsx
+++ b/ts/components/conversation/media-gallery/MediaGallery.tsx
@@ -81,12 +81,17 @@ const Tab = ({
   onSelect?: (event: TabSelectEvent) => void;
   type: AttachmentType;
 }) => {
-  const handleClick = onSelect ? () => onSelect({ type }) : undefined;
+  const handleClick = onSelect
+    ? () => {
+        onSelect({ type });
+      }
+    : undefined;
 
   return (
     <div
       style={isSelected ? styles.tab.active : styles.tab.default}
       onClick={handleClick}
+      role="tab"
     >
       {label}
     </div>
@@ -146,6 +151,7 @@ export class MediaGallery extends React.Component<Props, State> {
             throw missingCaseError(type);
         }
       })();
+
       return <EmptyState data-test="EmptyState" label={label} />;
     }
 
@@ -157,6 +163,7 @@ export class MediaGallery extends React.Component<Props, State> {
         section.type === 'yearMonth'
           ? date.format(MONTH_FORMAT)
           : i18n(section.type);
+
       return (
         <AttachmentSection
           key={header}
diff --git a/ts/components/conversation/media-gallery/MediaGridItem.tsx b/ts/components/conversation/media-gallery/MediaGridItem.tsx
index a2d5118b7..5358db0a8 100644
--- a/ts/components/conversation/media-gallery/MediaGridItem.tsx
+++ b/ts/components/conversation/media-gallery/MediaGridItem.tsx
@@ -25,7 +25,7 @@ const styles = {
   },
 };
 
-export class MediaGridItem extends React.Component<Props, {}> {
+export class MediaGridItem extends React.Component<Props> {
   public renderContent() {
     const { message } = this.props;
 
@@ -46,7 +46,7 @@ export class MediaGridItem extends React.Component<Props, {}> {
 
   public render() {
     return (
-      <div style={styles.container} onClick={this.props.onClick}>
+      <div style={styles.container} role="button" onClick={this.props.onClick}>
         {this.renderContent()}
       </div>
     );
diff --git a/ts/components/conversation/media-gallery/groupMessagesByDate.ts b/ts/components/conversation/media-gallery/groupMessagesByDate.ts
index 2cf1c76dd..23f5c302c 100644
--- a/ts/components/conversation/media-gallery/groupMessagesByDate.ts
+++ b/ts/components/conversation/media-gallery/groupMessagesByDate.ts
@@ -31,6 +31,7 @@ export const groupMessagesByDate = (
   const yearMonthMessages = Object.values(
     groupBy(groupedMessages.yearMonth, 'order')
   ).reverse();
+
   return compact([
     toSection(groupedMessages.today),
     toSection(groupedMessages.yesterday),
@@ -138,6 +139,7 @@ const withSection = (referenceDateTime: moment.Moment) => (
 
   const month: number = messageReceivedDate.month();
   const year: number = messageReceivedDate.year();
+
   return {
     order: year * 100 + month,
     type: 'yearMonth',
diff --git a/ts/components/conversation/media-gallery/types/Message.tsx b/ts/components/conversation/media-gallery/types/Message.tsx
index 285c28e8e..c8dbca3ae 100644
--- a/ts/components/conversation/media-gallery/types/Message.tsx
+++ b/ts/components/conversation/media-gallery/types/Message.tsx
@@ -66,6 +66,7 @@ export const withObjectURL = (message: Message): Message => {
     data: attachment.data,
     type: attachment.contentType,
   });
+
   return {
     ...message,
     objectURL,
diff --git a/ts/components/utility/BackboneWrapper.tsx b/ts/components/utility/BackboneWrapper.tsx
index 0a3e75fe2..6ed15ceb9 100644
--- a/ts/components/utility/BackboneWrapper.tsx
+++ b/ts/components/utility/BackboneWrapper.tsx
@@ -21,7 +21,7 @@ interface BackboneViewConstructor {
  * Allows Backbone Views to be rendered inside of React (primarily for the Style Guide)
  * while we slowly replace the internals of a given Backbone view with React.
  */
-export class BackboneWrapper extends React.Component<Props, {}> {
+export class BackboneWrapper extends React.Component<Props> {
   protected el: HTMLElement | null = null;
   protected view: BackboneView | null = null;
 
@@ -44,10 +44,9 @@ export class BackboneWrapper extends React.Component<Props, {}> {
   };
 
   protected setup = () => {
-    const { el } = this;
     const { View, options } = this.props;
 
-    if (!el) {
+    if (!this.el) {
       return;
     }
     this.view = new View(options);
@@ -55,7 +54,7 @@ export class BackboneWrapper extends React.Component<Props, {}> {
 
     // It's important to let the view create its own root DOM element. This ensures that
     //   its tagName property actually takes effect.
-    el.appendChild(this.view.el);
+    this.el.appendChild(this.view.el);
   };
 
   protected teardown() {
diff --git a/ts/html/index.ts b/ts/html/index.ts
index 7121781bc..bf1b95408 100644
--- a/ts/html/index.ts
+++ b/ts/html/index.ts
@@ -1,3 +1,4 @@
+// tslint:disable-next-line: match-default-export-name
 import linkTextInternal from '../../js/modules/link_text';
 
 export const linkText = (value: string): string =>
diff --git a/ts/styleguide/ConversationContext.tsx b/ts/styleguide/ConversationContext.tsx
index dba62ce9c..0cbb9cc7f 100644
--- a/ts/styleguide/ConversationContext.tsx
+++ b/ts/styleguide/ConversationContext.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import classnames from 'classnames';
+import classNames from 'classnames';
 
 interface Props {
   /**
@@ -13,13 +13,13 @@ interface Props {
  * Provides the parent elements necessary to allow the main Signal Desktop stylesheet to
  * apply (with no changes) to messages in the Style Guide.
  */
-export class ConversationContext extends React.Component<Props, {}> {
+export class ConversationContext extends React.Component<Props> {
   public render() {
     const { theme, type } = this.props;
 
     return (
       <div className={theme || 'android'}>
-        <div className={classnames('conversation', type || 'private')}>
+        <div className={classNames('conversation', type || 'private')}>
           <div className="discussion-container" style={{ padding: '0.5em' }}>
             <ul className="message-list">{this.props.children}</ul>
           </div>
diff --git a/ts/styleguide/StyleGuideUtil.ts b/ts/styleguide/StyleGuideUtil.ts
index 8d57014c9..511b55fe6 100644
--- a/ts/styleguide/StyleGuideUtil.ts
+++ b/ts/styleguide/StyleGuideUtil.ts
@@ -1,11 +1,10 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
-import { padStart, sample } from 'lodash';
+import { default as _, padStart, sample } from 'lodash';
 import libphonenumber from 'google-libphonenumber';
 
-import _ from 'lodash';
 import moment from 'moment';
-import qs from 'qs';
+import QueryString from 'qs';
 
 export { _ };
 
@@ -57,6 +56,7 @@ function makeObjectUrl(data: ArrayBuffer, contentType: string): string {
   const blob = new Blob([data], {
     type: contentType,
   });
+
   return URL.createObjectURL(blob);
 }
 
@@ -90,7 +90,7 @@ export {
 const parent = window as any;
 
 const query = window.location.search.replace(/^\?/, '');
-const urlOptions = qs.parse(query);
+const urlOptions = QueryString.parse(query);
 const theme = urlOptions.theme || 'android';
 const locale = urlOptions.locale || 'en';
 
@@ -99,11 +99,11 @@ import localeMessages from '../../_locales/en/messages.json';
 
 // @ts-ignore
 import { setup } from '../../js/modules/i18n';
-import filesize from 'filesize';
+import fileSize from 'filesize';
 
 const i18n = setup(locale, localeMessages);
 
-parent.filesize = filesize;
+parent.filesize = fileSize;
 
 parent.i18n = i18n;
 parent.React = React;
@@ -137,6 +137,7 @@ const Attachments = {
 parent.Signal = Signal.setup({
   Attachments,
   userDataPath: '/',
+  // tslint:disable-next-line:no-backbone-get-set-outside-model
   getRegionCode: () => parent.storage.get('regionCode'),
 });
 parent.SignalService = SignalService;
diff --git a/ts/styleguide/tslint.json b/ts/styleguide/tslint.json
new file mode 100644
index 000000000..4645335d0
--- /dev/null
+++ b/ts/styleguide/tslint.json
@@ -0,0 +1,11 @@
+{
+  "defaultSeverity": "error",
+  "extends": ["../../tslint.json"],
+  "rules": {
+    // To allow the use of devDependencies here
+    "no-implicit-dependencies": false,
+
+    // All tests use arrow functions, and they can be long
+    "max-func-body-length": false
+  }
+}
diff --git a/ts/test/components/media-gallery/groupMessagesByDate.ts b/ts/test/components/media-gallery/groupMessagesByDate_test.ts
similarity index 99%
rename from ts/test/components/media-gallery/groupMessagesByDate.ts
rename to ts/test/components/media-gallery/groupMessagesByDate_test.ts
index 84f9b6fb5..57cb113d9 100644
--- a/ts/test/components/media-gallery/groupMessagesByDate.ts
+++ b/ts/test/components/media-gallery/groupMessagesByDate_test.ts
@@ -1,5 +1,3 @@
-import 'mocha';
-
 import { assert } from 'chai';
 import { shuffle } from 'lodash';
 
diff --git a/ts/test/html/index_test.ts b/ts/test/html/index_test.ts
index 87ffc84a9..cefd9469a 100644
--- a/ts/test/html/index_test.ts
+++ b/ts/test/html/index_test.ts
@@ -1,4 +1,3 @@
-import 'mocha';
 import { assert } from 'chai';
 
 import * as HTML from '../../html';
@@ -52,6 +51,7 @@ describe('HTML', () => {
       {
         name: 'URLs without protocols',
         input: 'github.com',
+        // tslint:disable-next-line:no-http-string
         outputHref: 'http://github.com',
         outputLabel: 'github.com',
       },
diff --git a/ts/test/tslint.json b/ts/test/tslint.json
new file mode 100644
index 000000000..4645335d0
--- /dev/null
+++ b/ts/test/tslint.json
@@ -0,0 +1,11 @@
+{
+  "defaultSeverity": "error",
+  "extends": ["../../tslint.json"],
+  "rules": {
+    // To allow the use of devDependencies here
+    "no-implicit-dependencies": false,
+
+    // All tests use arrow functions, and they can be long
+    "max-func-body-length": false
+  }
+}
diff --git a/ts/test/types/Attachment_test.ts b/ts/test/types/Attachment_test.ts
index b7ef5f754..a7d251697 100644
--- a/ts/test/types/Attachment_test.ts
+++ b/ts/test/types/Attachment_test.ts
@@ -1,7 +1,3 @@
-/**
- * @prettier
- */
-import 'mocha';
 import { assert } from 'chai';
 
 import * as Attachment from '../../types/Attachment';
diff --git a/ts/test/types/Contact_test.ts b/ts/test/types/Contact_test.ts
index 775429adc..40a5d63c6 100644
--- a/ts/test/types/Contact_test.ts
+++ b/ts/test/types/Contact_test.ts
@@ -1,4 +1,3 @@
-import 'mocha';
 import { assert } from 'chai';
 
 import { getName } from '../../types/Contact';
diff --git a/ts/test/types/Conversation_test.ts b/ts/test/types/Conversation_test.ts
index 67187f10a..7ff2330bf 100644
--- a/ts/test/types/Conversation_test.ts
+++ b/ts/test/types/Conversation_test.ts
@@ -1,4 +1,3 @@
-import 'mocha';
 import { assert } from 'chai';
 
 import * as Conversation from '../../types/Conversation';
diff --git a/ts/test/types/Settings_test.ts b/ts/test/types/Settings_test.ts
index 6b23aca22..d54f9107b 100644
--- a/ts/test/types/Settings_test.ts
+++ b/ts/test/types/Settings_test.ts
@@ -1,11 +1,11 @@
 import os from 'os';
-import sinon from 'sinon';
+import Sinon from 'sinon';
 import { assert } from 'chai';
 
 import * as Settings from '../../../ts/types/Settings';
 
 describe('Settings', () => {
-  const sandbox = sinon.createSandbox();
+  const sandbox = Sinon.createSandbox();
 
   describe('isAudioNotificationSupported', () => {
     context('on macOS', () => {
diff --git a/ts/test/types/message/initializeAttachmentMetadata_test.ts b/ts/test/types/message/initializeAttachmentMetadata_test.ts
index 16ba687e3..207012db4 100644
--- a/ts/test/types/message/initializeAttachmentMetadata_test.ts
+++ b/ts/test/types/message/initializeAttachmentMetadata_test.ts
@@ -1,4 +1,3 @@
-import 'mocha';
 import { assert } from 'chai';
 
 import * as Message from '../../../../ts/types/message/initializeAttachmentMetadata';
diff --git a/ts/types/Attachment.ts b/ts/types/Attachment.ts
index 3599f184f..b2451420d 100644
--- a/ts/types/Attachment.ts
+++ b/ts/types/Attachment.ts
@@ -121,6 +121,7 @@ export const getSuggestedFilename = ({
     : '';
   const fileType = getFileExtension(attachment);
   const extension = fileType ? `.${fileType}` : '';
+
   return `${prefix}${suffix}${extension}`;
 };
 
@@ -133,7 +134,6 @@ export const getFileExtension = (attachment: Attachment): string | null => {
     case 'video/quicktime':
       return 'mov';
     default:
-      // TODO: Use better MIME --> file extension mapping:
       return attachment.contentType.split('/')[1];
   }
 };
diff --git a/ts/types/Contact.ts b/ts/types/Contact.ts
index 4ff4f1027..bdc7badfa 100644
--- a/ts/types/Contact.ts
+++ b/ts/types/Contact.ts
@@ -85,6 +85,7 @@ export function contactSelector(
       },
     };
   }
+
   return {
     ...contact,
     avatar,
diff --git a/ts/types/Message.ts b/ts/types/Message.ts
index ea5417de0..1a2a6baad 100644
--- a/ts/types/Message.ts
+++ b/ts/types/Message.ts
@@ -100,5 +100,6 @@ export const hasExpiration = (message: Message): boolean => {
   }
 
   const { expireTimer } = message;
+
   return typeof expireTimer === 'number' && expireTimer > 0;
 };
diff --git a/ts/types/backbone/Collection.ts b/ts/types/backbone/Collection.ts
index 078538c42..d5a4df388 100644
--- a/ts/types/backbone/Collection.ts
+++ b/ts/types/backbone/Collection.ts
@@ -4,5 +4,5 @@ export interface Collection<T> {
   models: Array<Model<T>>;
   // tslint:disable-next-line no-misused-new
   new (): Collection<T>;
-  fetch(options: object): JQuery.Deferred<any, any, any>;
+  fetch(options: object): JQuery.Deferred<any>;
 }
diff --git a/ts/util/arrayBufferToObjectURL.ts b/ts/util/arrayBufferToObjectURL.ts
index 8375faa3b..760193c09 100644
--- a/ts/util/arrayBufferToObjectURL.ts
+++ b/ts/util/arrayBufferToObjectURL.ts
@@ -14,5 +14,6 @@ export const arrayBufferToObjectURL = ({
   }
 
   const blob = new Blob([data], { type });
+
   return URL.createObjectURL(blob);
 };
diff --git a/ts/util/emoji.ts b/ts/util/emoji.ts
index 3aa3dd708..f15e75282 100644
--- a/ts/util/emoji.ts
+++ b/ts/util/emoji.ts
@@ -29,6 +29,7 @@ export function replaceColons(str: string) {
     if (code) {
       return instance.data[code][0][0];
     }
+
     return m;
   });
 }
@@ -51,6 +52,7 @@ function getCountOfAllMatches(str: string, regex: RegExp) {
 
 function hasNormalCharacters(str: string) {
   const noEmoji = str.replace(instance.rx_unified, '').trim();
+
   return noEmoji.length > 0;
 }
 
@@ -96,6 +98,7 @@ export function getReplacementData(
         variation,
       };
     }
+
     return {
       value: unified,
     };
diff --git a/tslint.json b/tslint.json
index 01efd4298..3e15ab7ad 100644
--- a/tslint.json
+++ b/tslint.json
@@ -1,6 +1,6 @@
 {
   "defaultSeverity": "error",
-  "extends": ["tslint:recommended", "tslint-react"],
+  "extends": ["tslint:recommended", "tslint-react", "tslint-microsoft-contrib"],
   "jsRules": {},
   "rules": {
     "align": [
@@ -35,6 +35,9 @@
     "mocha-no-side-effect-code": false,
     "mocha-unneeded-done": true,
 
+    // We always want 'as Type'
+    "no-angle-bracket-type-assertion": true,
+
     "no-consecutive-blank-lines": [true, 2],
     "object-literal-key-quotes": [true, "as-needed"],
     "object-literal-sort-keys": false,
@@ -73,7 +76,54 @@
         },
         "esSpecCompliant": true
       }
-    ]
+    ],
+
+    // Disabling a large set of Microsoft-recommended rules
+
+    // Modifying:
+
+    // React components and namespaces are Pascal case
+    "variable-name": [true, "allow-pascal-case"],
+
+    // Maybe will turn on:
+
+    // We're not trying to be comprehensive with JSDoc right now. We have the style guide.
+    "completed-docs": false,
+    // Today we have files with a single named export which isn't the filename. Eventually.
+    "export-name": false,
+    // We have a lot of 'any' in our code today
+    "no-any": false,
+    // We use this today, could get rid of it
+    "no-increment-decrement": false,
+    // This seems to detect false positives: any multi-level object literal, for example
+    "no-object-literal-type-assertion": false,
+    // I like relative references to the current dir, or absolute. Maybe can do this?
+    "no-relative-imports": false,
+    // We have a lot of 'any' in our code today
+    "no-unsafe-any": false,
+    // Not everything needs to be typed right now
+    "typedef": false,
+
+    // Probably won't turn on:
+
+    // We want to import a capitalized React, for example
+    "import-name": false,
+    // We have the styleguide for better docs
+    "missing-jsdoc": false,
+    // 'type' and 'number' are just too common
+    "no-reserved-keywords": false,
+    // The style guide needs JSDoc-style block comments to extract proptype documentation
+    "no-single-line-block-comment": false,
+    // Out-of-order functions can improve readability
+    "no-use-before-declare": false,
+    // We use Array<type> syntax
+    "prefer-array-literal": false,
+    // We prefer key: () => void syntax, because it suggests an object instead of a class
+    "prefer-method-signature": false,
+    // 'as' is nicer than angle brackets.
+    "prefer-type-cast": false,
+    // We use || and && shortcutting because we're javascript programmers
+    "strict-boolean-expressions": false
   },
   "rulesDirectory": ["node_modules/tslint-microsoft-contrib"]
 }