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

Log in

10,166 extensions found in Web Development

Filter results
Search results
  • WindowSizer

    WindowSizer

    Quickly resize the window to one of your favorite sizes

    Dr. Cheap

    1,474 users

  • Youtube Play All

    Youtube Play All

    Adds a 'Play All' button to YouTube, allowing video playback in Latest, Popular, or Oldest order.

    CatBraaain

    1,467 users

  • PoE Overlay Sync

    PoE Overlay Sync

    Sync your Path of Exile session with PoE Overlay

    Kyusung4698

    1,461 users

  • Pesticide, for Firefox

    Pesticide, for Firefox

    Kill your css layout bugs! Pesticide is an open source CSS tool created by Adam Morse and available for download, forking on Github at http://pesticide.io/

    Daniel Oshiro

    1,458 users

  • Season Pass Pass

    Season Pass Pass

    Travel back in time and pull rewards from any previous season pass in destiny 2

    Evade

    1,452 users

  • Rotate that Video Player

    Rotate that Video Player

    Improve your video experience by effortlessly rotating your video clips by 90, 180, or 270 degrees.

    Stefan vd

    1,452 users

  • Speed Booster for ChatGPT: Fix Lag in Long Chats

    Speed Booster for ChatGPT: Fix Lag in Long Chats

    Stop browser freezing and lag in long ChatGPT conversations. Instantly speeds up the entire UI and reduces memory usage.

    BGSN Digital

    1,448 users

  • View Background Image

    View Background Image

    Adds "View Background Image" to the context menu.

    foooomio

    1,447 users

  • IndicateTLS

    IndicateTLS

    Displays negotiated SSL/TLS protocol version and additional security information in the address bar

    Jannis Pinter

    1,431 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

    1,422 users

  • Web Edit

    Web Edit

    Easily edit websites temporarily with a click of a button.

    Ryan Luu

    1,413 users

  • (Animated) Nyan Cat Progress Bar for YouTube™

    (Animated) Nyan Cat Progress Bar for YouTube™

    Nyan Cat Progress Bar for YouTube™ ~~ [Animated] ~~

    Ferris Etanish

    1,393 users

  • External Application Button (WebExtension)

    External Application Button (WebExtension)

    A highly customizable external application button and context-menu items

    Andy Portmen

    1,392 users

  • Copy URL To Clipboard

    Copy URL To Clipboard

    Copy document URL / link URL to clipboard as HTML, Markdown, Text etc.

    asamuzaK

    1,381 users

  • Swagger UI

    Swagger UI

    Swagger-UI für Firefox

    Steven Tappert

    1,375 users

  • Window Resizer

    Window Resizer

    Resize the browser window. The resolution list supports customization.

    antwhere.com

    1,359 users

  • MetaMask Legacy Web3

    MetaMask Legacy Web3

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

    danfinlay

    1,351 users

  • Augury

    Augury

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

    Rangle.io

    1,344 users

  • Free OpenVPN Server Finder

    Free OpenVPN Server Finder

    Display up-to-date list of public OpenVPN servers provided by VPN Gate (University of Tsukuba)

    Andy Portmen

    1,330 users

  • Talisman Wallet

    Talisman Wallet

    The self-custody wallet for the next era of intelligent DeFi. One unified portfolio for Ethereum, Solana, Bittensor, Polkadot, and more.

    Talisman

    1,330 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

    1,328 users

  • AInspector for WCAG Accessibility Evaluation

    AInspector for WCAG Accessibility Evaluation

    Inspects web pages for features and issues related to WCAG 2.2 level A and AA requirements for making web pages more accessible to people with disabilities using web accessibility standards, including WCAG, ARIA and ARIA in HTML specifications.

    Jon Gunderson

    1,312 users

  • Alpine.js devtools

    Alpine.js devtools

    DevTools extension for debugging Alpine.js applications.

    Hugo

    1,306 users

  • Download with FlashGet

    Download with FlashGet

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

    Joe Ertaba

    1,300 users

  • Multiple Search and Highlight

    Multiple Search and Highlight

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

    Brian

    1,298 users