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

Log in

9,801 extensions found in Web Development

Filter results
Search results
  • JavaScript QR Code

    JavaScript QR Code

    Make QR Codes in pure JavaScript

    Francesco De Stefano

    490 users

  • URL Incrementer - A Next Page Incrementer

    URL Incrementer - A Next Page Incrementer

    Increment a URL or go to the next page. Supports auto, multi, and advanced incrementing functions.

    Sixcious

    486 users

  • Adaptive Darkmode

    Adaptive Darkmode

    A simple add-on that lets you pick and choose what sites to apply a slick, dark mode to.

    Ninety Nine for One

    485 users

  • Clear Cache and Data

    Clear Cache and Data

    Clears the browser cache and other selected storage.

    Button Guy

    481 users

  • Show site IP

    Show site IP

    Shows the site's IP address in the browser's address bar. Just hover your mouse over the icon to display it or click to copy.

    mad1ost

    481 users

  • PDF to JPG Converter

    PDF to JPG Converter

    Convert PDF documents to high-quality JPG/JPEG images

    Balvin

    478 users

  • Headers

    Headers

    Take control of your web requests with the Headers extension for Firefox! This powerful tool allows you to effortlessly add, modify, or remove HTTP headers for any website you visit, giving you enhanced privacy, security, and customization options.

    Kuba Zygmunt

    475 users

  • Vonage® Integration Suite

    Vonage® Integration Suite

    Cloud phone system integration with top business applications. Done better.

    Vonage Integration Suite

    475 users

  • Three.js Developer Tools

    Three.js Developer Tools

    Developer tools for 3D library three.js.

    Jordan Santell

    473 users

  • GIFs for GitHub

    GIFs for GitHub

    Easily search GIPHY to add a GIF into any Github comment box.

    Nick

    472 users

  • Disable CSP for a minute

    Disable CSP for a minute

    Temporarily disables CSP for the current tab's website. Right click on the page, then disable CSP.

    python273

    472 users

  • Notifier for GitHub

    Notifier for GitHub

    Get notified about new GitHub notifications

    Sindre Sorhus

    471 users

  • Remove/Crop-to Selection

    Remove/Crop-to Selection

    Remove or crop-to selection from context menu so that you can print or save only the parts you need. Additionally you can remove clicked elements and also remove ads, videos or other third-party content from web pages.

    Nikos Asimakis

    469 users

  • Enable Right Click for Web Developer

    Enable Right Click for Web Developer

    Re-enable Right Click for Web Developer™

    codehemu

    467 users

  • All-In-One PageSpeed Test

    All-In-One PageSpeed Test

    Test any website performance with main test tools with one single click: Google PageTest Insights, GTmetrix, Yellow Lab Tools

    Evgeniy Orlov

    464 users

  • ScratchTools

    ScratchTools

    Great tools to make Scratching easier!

    rgantzos

    463 users

  • Cookie Popup Blocker

    Cookie Popup Blocker

    Automatically blocks cookies and cookie consent popups

    Sumalya Chatterjee

    462 users

  • W3Techs Website Technology Information

    W3Techs Website Technology Information

    Shows which web technologies the current site is using.

    SamSol

    461 users

  • Table Extractor - TableConvert

    Table Extractor - TableConvert

    Instantly convert tables on any webpage to multiple formats

    Fechin

    459 users

  • PeerName: Surf Blockchain-Based Domains

    PeerName: Surf Blockchain-Based Domains

    Enables the resolving of Dot-BIT domains by Namecoin. Also .emc, .coin, .lib and .bazar domains by EmerCoin.

    John Galt

    459 users

  • PageProof online proofing

    PageProof online proofing

    Extends your experience of PageProof so you can review and approve anything and everything! Making feedback welcome.

    PageProof

    459 users

  • Inspector DOM Sidebar

    Inspector DOM Sidebar

    Adds a new sidebar to the developer tools inspector panel, that shows the properties of the selected element.

    nchevobbe

    458 users

  • Onion Control (anonymous proxy)

    Onion Control (anonymous proxy)

    Brings the anonymity of the Tor network and modifies few settings to protect user privacy

    Andy Portmen

    455 users

  • JSON Beautify It

    JSON Beautify It

    Tool for beautifying JSON data, AJAX or API responses in browser

    Igor Lazarev

    455 users

  • Decodo(Smartproxy) Extension

    Decodo(Smartproxy) Extension

    Start using proxies with Firefox Proxy Add-on. Effortlessly bring all the essential proxy features into your Firefox browser with the Decodo add-on.

    Decodo

    454 users