To use these add-ons, you'll need to download Firefox.

Log in

11,749 extensions found in Appearance

Filter results
Search results
  • YouTube LiveChat Flusher (Danmaku Chat)

    YouTube LiveChat Flusher (Danmaku Chat)

    Provides bullet chatting (danmaku) on YouTube Live, like niconico or bilibili.

    _y_s

    4,098 users

  • Window Resizer

    Window Resizer

    Easily set the layout (size & position) of your browser window

    Kelvin

    4,060 users

  • Bionic Reader

    Bionic Reader

    - Apply Bionic Reading style with adjustable strength to a webpage. - Adjustable vowels for different languages. - Adjustable font family, font size, font weight and font opacity. - Support Unicode characters. - Apply dark mode to a webpage.

    Rain Jr.

    4,019 users

  • View Page Source

    View Page Source

    View the source code of a page with the click of a button.

    Carlos Jeurissen

    3,970 users

  • Rotate Youtube Video (+ Zoom / Mirror)

    Rotate Youtube Video (+ Zoom / Mirror)

    Rotate - support 0°, 90°, 180°, 270° - affect Youtube video preview Zoom / Mirror - support long press +,- button * the value will be reset after pressing the reset button or the rotate button * not affect Youtube video preview

    znwyrz

    3,963 users

  • Checker Plus for Google Calendar™

    Checker Plus for Google Calendar™

    See your next events, get meeting desktop notifications, add or snooze events without opening the Google Calendar page!

    Jason Savard

    3,919 users

  • Yahoo Mail Hide Ad Panel

    Yahoo Mail Hide Ad Panel

    Permanently hides the Ads panel on the right side of New Yahoo! Mail, the 'Sponsored' email at the Top, and ads on the Left to give you a full-width Premium email experience for free! The other option, of course is to pay $50 a year to Yahoo! Inc. :)

    Piyush Soni

    3,906 users

  • HLS Downloader

    HLS Downloader

    Download fragmented media files with HLS (HTTP Live Streaming) downloader.

    Leonardo

    3,839 users

  • YouTube Windowed FullScreen

    YouTube Windowed FullScreen

    Watch videos on YouTube fullscreen within your browsers screen.

    navi.jador

    3,778 users

  • Undo Closed Tabs Button

    Undo Closed Tabs Button

    Add a toolbar button onto any toolbar to undo closed tabs

    Thomas

    3,771 users

  • EuroSaver - Amazon Europe Price Comparison

    EuroSaver - Amazon Europe Price Comparison

    Simplifies Amazon product price comparison between all european Amazon stores.

    Foundere Developer

    3,726 users

  • Change Geolocation (Location Guard)

    Change Geolocation (Location Guard)

    Easily change your geographic location (Geolocation) to your desired one and protect your privacy.

    ilGur

    3,716 users

  • Video & Audio Downloader

    Video & Audio Downloader

    Easily download video & audio streams via toolbar popup.

    Glin

    3,674 users

  • Flash Block (Plus)

    Flash Block (Plus)

    Provides control over Flash contents

    AdblockLite

    3,670 users

  • Google Docs Dark Mode

    Google Docs Dark Mode

    Dark mode for Google Docs!

    computer_king_

    3,653 users

  • Fandom Enhance

    Fandom Enhance

    Removes bloat from any fandom.com wiki

    maltejur

    3,633 users

  • Pinterest DARK THEME

    Pinterest DARK THEME

    Apply a different themes to Pinterest web version.

    Iris

    3,627 users

  • YouTube in HD (720p, 1080p, 1440p, 2160p)

    YouTube in HD (720p, 1080p, 1440p, 2160p)

    Watch YouTube in the full-HD quality or the highest available one

    James Fray

    3,618 users

  • Route with Google Maps

    Route with Google Maps

    Find an address quickly using Google Maps. Select an address anywhere on a website, open the context menu, select "Route to ''your address" entry from the context menu and the route to the address will be shown in a new tab.

    Daniel Wiedner

    3,607 users

  • Auto Fullscreen

    Auto Fullscreen

    Open all Firefox windows in full screen mode

    insiderser

    3,573 users

  • Reddit Ad Remover

    Reddit Ad Remover

    Removes Reddit 'PROMOTED' posts and advertisements in the feed and sidebar.

    Blizz3

    3,564 users

  • ✨ Awesome Emoji Picker ✨

    ✨ Awesome Emoji Picker ✨

    Modern, nice emoji picker that you can use to find 🔎 and select emojis. 😀 It will be copied to your clipboard 📋 or even directly inserted into the page, when you click 🖱️ on it. You will certainly like it. 😎

    rugk

    3,517 users

  • Invert Colors

    Invert Colors

    A simple FireFox add-on that inverts the web page colors (including images) to make pages easier to read in darker settings. Github repo: https://github.com/Max-Github/FireFoxInvertColors

    Max

    3,501 users

  • Dark Mode for Wikipedia

    Dark Mode for Wikipedia

    Dark mode for English Wikipedia.

    mrhirsch

    3,475 users

  • Bookmarks Manager and Viewer

    Bookmarks Manager and Viewer

    An elegant bookmarks manager with fuzzy search and more

    InBasic

    3,455 users