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

Log in

12,577 extensions found in Web Development

Filter results
Search results
  • Multiple Search and Highlight

    Multiple Search and Highlight

    Highlight multiple words separated by comma, space or arbitrary separator with regular expression support

    Brian

    1,205 users

  • M3U8/HLS Player with Custom Keyboard Controls

    M3U8/HLS Player with Custom Keyboard Controls

    Advanced M3U8/HLS player with customized keyboard controls/shortcuts just like YouTube. Supports keyboard shortcuts, PIP mode, frame navigation, and live streams.

    Bishal Dahal

    1,200 users

  • Material Icons for Github

    Material Icons for Github

    Replace the file/folder icons on github file browsers with icons representing the file's type and which tool it is used by.

    Claudio Santos

    1,197 users

  • Dimensions

    Dimensions

    A tool for designers to measure screen dimensions

    Felix Niklas

    1,197 users

  • Grids & Rulers

    Grids & Rulers

    Create rulers and grids overlays to help develop your web applications

    Jeremie Patonnier

    1,194 users

  • BiliPlus - Bilibili 加大杯，细节从大杯做起

    BiliPlus - Bilibili 加大杯，细节从大杯做起

    专门为细节控的人群使用，只要在B站上设计不合理的地方，都可以加入到大杯中。

    Timothy Lau

    1,188 users

  • Mobile DevTools

    Mobile DevTools

    A firefox add-on to get developper tools using eruda on your phone.

    surv

    1,183 users

  • Edit Anything

    Edit Anything

    Edit Anything from Chrome is now on Firefox. Before It was on Chrome. Click icon to turn on. sets contentEditable to true. Click to set false. If on then click text/any other element and make the changes. Changes don't persist after reload.

    Kellen

    1,174 users

  • Page Hacker

    Page Hacker

    Edit in Firefox the page displayed in any tab, with formatting tools.

    nico@nc

    1,167 users

  • Download with FlashGet

    Download with FlashGet

    when activated, interrupts the built-in download manager to direct links to FlashGet

    Joe Ertaba

    1,156 users

  • The Tab Suspender

    The Tab Suspender

    Suspends inactive tabs after a set time by replacing them with a custom suspended page.

    Faisal Bhuiyan

    1,152 users

  • Augury

    Augury

    Extends the Developer Tools, adding tools for debugging and profiling Angular applications.

    Rangle.io

    1,149 users

  • NoFollow

    NoFollow

    Outlines nofollow links, detect nofollow and noindex meta tags on webpages. Features website filtering and custom CSS outline styles

    Igor Jerosimić

    1,144 users

  • Alpine.js devtools

    Alpine.js devtools

    DevTools extension for debugging Alpine.js applications.

    Hugo

    1,132 users

  • Katalon Recorder | Automated Selenium Tests Genera

    Katalon Recorder | Automated Selenium Tests Genera

    Selenium IDE alternative to record and export Selenium scripts. Provides reports & screenshots. Fast & open-sourced.

    Katalon.com

    1,125 users

  • MaterialDesignIcons Picker

    MaterialDesignIcons Picker

    Quick & easy icon picker

    chteuchteu

    1,121 users

  • Ace Script

    Ace Script

    User Script Manager with the support of Ace Stream technologies

    Ace Stream

    1,120 users

  • Twitter

    Twitter

    Download the images and videos.

    Lim Xiu Quan

    1,115 users

  • ClaudeCodeBrowser

    ClaudeCodeBrowser

    ClaudeCodeBrowser enables AI-powered browser automation through the Claude Code CLI. It allows Claude to interact with web pages by taking screenshots, clicking elements, typing text, scrolling, and navigating - all controlled via a local MCP server.

    nanogenomic

    1,102 users

  • Display #Anchors

    Display #Anchors

    Displays anchors for all content in the current web page without breaking the layout.

    Rob W

    1,100 users

  • OwlZoom for Youtube Videos

    OwlZoom for Youtube Videos

    Zoom+in Youtube Videos

    Ferris Etanish

    1,100 users

  • FullPage Capture

    FullPage Capture

    Full-page screenshot to clipboard. No tracking, no servers a fully oss solution

    mosfor

    1,093 users

  • MetaMask Legacy Web3

    MetaMask Legacy Web3

    Adds MetaMask's legacy window.web3 API to your browser

    danfinlay

    1,092 users

  • autoClick

    autoClick

    I make clicks... for real. If you play idle/clicker games this one is for you. Just select a key in your keyboard and press it down for the mouse to left-click, and you can it pressed down for all the time you want.

    mmoroca

    1,071 users

  • Tab2QR

    Tab2QR

    A minimalist browser extension that generates QR codes from your current tab, allows you to edit the encoded content, copy QR code image to clipboard, or download as PNG or SVG files.

    James Shih

    1,069 users