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

Log in

12,239 extensions found in Web Development

Filter results
Search results
  • Edit Request Headers

    Edit Request Headers

    Add/Modify/Remove HTTP request headers (like Referer or Cookie) via declarativeNetRequest.

    AG

    1 user

  • TCP States DevTools Panel

    TCP States DevTools Panel

    Monitor TCP connection states (LISTEN, ESTABLISHED, SYN_SENT, CLOSE_WAIT, LAST_ACK, CLOSED) in in real-time within a Firefox DevTools Panel. Export logs as CSV and view warnings.

    Libor Benes (Dr. B)

    1 user

  • Website Performance Monitor

    Website Performance Monitor

    Monitor website performance, loading times, and optimization suggestions in real-time

    Vmax

    1 user

  • Sushi Dex Dapps

    Sushi Dex Dapps

    Swap Dapps,Decentralized Exchange & Liquidity Pool

    Sushi Labs

    1 user

  • WebClarityAI

    WebClarityAI

    Clear Understanding for Better Websites

    Nafiul

    1 user

  • File Converter

    File Converter

    Convert images to PDF, DOCX to PDF, PDF to images, and PDF to DOCX

    chuanyu

    1 user

  • ProxyServe

    ProxyServe

    Take control of your browser's network traffic with Proxy & Request Interceptor. This extension allows you to easily manage proxy server configurations and provides tools to inspect and log network requests originating from your active browser tab.

    Yashkumar Navadiya

    1 user

  • MobileLayout Tester

    MobileLayout Tester

    This tool aids in testing website layouts on various mobile devices, ensuring a user-friendly experience across screens.

    Win55

    1 user

  • MC AutoPilot

    MC AutoPilot

    A powerful extension for efficient scene navigation and Full Auto-play control.

    Shivraj H

    1 user

  • Auto Refrab

    Auto Refrab

    Tự động reload tab hiện tại theo chu kỳ (mặc định 30s).

    88vnbar

    1 user

  • Gem DevTools

    Gem DevTools

    Gem DevTools Extension to inspect and debug Gem elements

    mantou132

    1 user

  • Site24x7 Web Recorder

    Site24x7 Web Recorder

    Site24x7 Web Transaction (Browser) Recorder

    OKKING

    1 user

  • AIFEX | AI For Exploratory testing

    AIFEX | AI For Exploratory testing

    Help testers to collaborate on exploratory testing sessions.

    AIFEX

    1 user

  • Mobile View Tester

    Mobile View Tester

    Test your website look for different mobile devices with Mobile View Tester and checker and see how it appears.

    HMZDev

    1 user

  • PHPNav

    PHPNav

    Navigate with arrow keys in PHP Documentation You can use right or left arrow key for next page or previous page in PHP Documentation.

    Ahmet Elgun

    1 user

  • Markdown to HTML

    Markdown to HTML

    A browser extension (Chrome & Firefox) that enables real-time markdown editing with live HTML preview. Users can write markdown on the left pane and instantly see theWrite markdown and see live HTML preview. Copy or download instantly. 2026 DevDannyD

    Danie de Beer

  • FilterTraining

    FilterTraining

    找工作神器！这个时代最不缺的就是信息，最难的是怎么从大量的垃圾信息中提取出自己想要的！还在为招聘网站（智联/51job(前程无忧)/58/赶集/中华英才网/拉勾网/大街网）上的培训机构烦恼吗？搜索不到想要的信息？到处是培训机构的广告？不用怕，安装了FilterTraining，页面就会只剩下你想要的信息了~~暂时只收录了成都这边的培训机构，后续会增加到全国，以及自定义添加..敬请期待！有bug请反馈到 hudcan@sina.com或 QQ群 618387648 ,也请大家把知道的培训机构名称告

    Firefox user 12203510

    1 user

  • Link preview

    Link preview

    When hovered upon get an insight of a link, where it leads to and what it holds.

    Jha Madhav

    1 user

  • YouTube Music Everywhere

    YouTube Music Everywhere

    YouTube Music Everywhere: You can use YouTube Music as a newtab, popup, sidebar or window.

    Carlos Storm

  • msfconsole Commands

    msfconsole Commands

    A Firefox sidebar extension with 40 Metasploit Framework (MSF) commands, descriptions, and practical examples (flags, common invocations). • Offline reference for penetration testing workflows. Safe. No tracking. No data collection.

    Libor Benes (Dr. B)

    1 user

  • روبوت منعم | ONEFD AI Assistant

    روبوت منعم | ONEFD AI Assistant

    روبوت ذكي يلتقط أسئلة ONEFD ويرسلها إلى Gemini للحصول على إجابات فورية، مع تطبيق تلقائي وتنبيهات عربية ذكية.

    MX8

    1 user

  • xLog custom css debugger

    xLog custom css debugger

    A convenient extension for debugging custom css in xLog.

    birdgg

    1 user

  • Clustify

    Clustify

    Delete emails by keyword and AI-assisted auto labeling.

    pixelknightdev

    1 user

  • Content Override & Watch

    Content Override & Watch

    Reload web content from files on disk when they are modified.

    AnOtterWorld

    1 user

  • IFrame LazyLoader

    IFrame LazyLoader

    Add lazy loading support for iframes and embedded content. Deferring the loading of iframes and embedded elements, optimizing page loading performance and improving overall browsing efficiency.

    Cherisa

    1 user