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

Log in

17,210 extensions found in Appearance

Filter results
Search results
  • Office Web

    Office Web

    Displays online office documents in the browser (.doc*, .ppt*, .xls*, .odt)

    Houbo

    83 users

  • FurAffinity Features

    FurAffinity Features

    A collection of features and enhancements for Fur Affinity

    Midori Dragon

    83 users

  • Reverse Youtube

    Reverse Youtube

    Replacing Youtube playback window and right column

    しいのき

    83 users

  • Accumulate: Daily Chinese and Japanese

    Accumulate: Daily Chinese and Japanese

    Learning Chinese or Japanese? Replace your new tab page with a personal learning page featuring one new character everyday.

    Firefox user 13579386

    82 users

  • InstagramDarkTheme

    InstagramDarkTheme

    Change the instagram background to dark theme.

    Lim Xiu Quan

    82 users

  • YouTube Section Looper (opensource)

    YouTube Section Looper (opensource)

    Loop a selected segment of any YouTube video with optional repeat count. Bookmark your url's along with looper settings.

    Sudhir Babu Nakka

    82 users

  • NiftySplit (Port)

    NiftySplit (Port)

    Splits the screen and loads all links in the second window

    THFYM

    82 users

  • Rounded Tube

    Rounded Tube

    A minimal customizable modern YouTube theme.

    PITR

    82 users

  • TradingView NoAds

    TradingView NoAds

    Removes the annoying ads and the upgrade to pro message in TradingView - by mauri870 (github: https://github.com/mauri870)

    Thomas Pham

    82 users

  • Screen Resolution Simulator

    Screen Resolution Simulator

    Allows users to simulate various screen resolutions to test website responsiveness and layout compatibility.

    Genz Relax

    82 users

  • Come-back-deck

    Come-back-deck

    TweetDeckを取り戻せ!

    kawa-nobu

    82 users

  • Spotify Dynamic Theme Plus

    Spotify Dynamic Theme Plus

    Dynamic background with transparency and animations for Spotify

    cckats

    82 users

  • Valentines For Werewolves

    Valentines For Werewolves

    February 14th wasn't always "Valentine's Day". Acknowledge the day's origins as a pre-Roman festival by applying a not-safe-for-work alternate name coined by Warren Ellis in 2008.

    Argyle Werewolf

    82 users

  • MultiRow TweetDeck

    MultiRow TweetDeck

    MultiRow TweetDeck extends your TweetDeck layout with customizable rows.

    whatasoda

    81 users

  • Sort by Score Button

    Sort by Score Button

    Adds a button to insert 'sort:score' next to rule34 and gelbooru search bars.

    SeaDragon

    81 users

  • AI RTL (Persian/Farsi): Right-to-Left Fix for +40

    AI RTL (Persian/Farsi): Right-to-Left Fix for +40

    RTL extension for 40+ AI tools: Persian RTL alignment, Farsi font support, RTL optimization for Gemini, DeepSeek, Claude, Copilot, Perplexity, Grok and other AI chatbots

    Ali saffari

    81 users

  • Devtools (DEPRECATED, DO NOT USE)

    Devtools (DEPRECATED, DO NOT USE)

    A Firefox extension that adds various developer relating tooling to the browser.

    Casperschorr

    81 users

  • Full YouTube Theater

    Full YouTube Theater

    Hide everything but the video when in YouTube's theater mode.

    Jason

    81 users

  • Claude Sidebar Modifier

    Claude Sidebar Modifier

    Modify the Claude.ai sidebar width or hide the sidebar entirely

    cyanheads

    81 users

  • Better History

    Better History

    A nice and modern look for browser's history page.

    FABLe

    81 users

  • RTL DeepSeek , ChatGPT

    RTL DeepSeek , ChatGPT

    Automatically aligns RTL text and applies the Vazirmatn font on DeepSeek and ChatGPT for better readability.

    LaneZeroO

    81 users

  • Old Gmail Emoji

    Old Gmail Emoji

    A collection of the old-style gmail emojis for easy copy-pasteing.

    cb

    81 users

  • GoodbyeX

    GoodbyeX

    A simple add-on that removes the new "X" branding from Twitter.

    McMistrzYT

    81 users

  • Wider Mail for New Yahoo Mail

    Wider Mail for New Yahoo Mail

    Various improvements/fixes for New Yahoo Mail

    def00111

    80 users

  • Leetcode-Premium-X

    Leetcode-Premium-X

    Leetcode-Premium-X is a Firefox addon which can be used by anyone who are preparing for technical interviews or improving their coding skills on the LeetCode platform.

    vikas pandey

    80 users