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

Log in

13,167 extensions found in Web Development

Filter results
Search results
  • Per-Domain User CSS

    Per-Domain User CSS

    Add custom CSS per domain. Modify fonts, colors, and layouts on any website. Each domain has its own saved style. Includes enable/disable toggle, preview, and save options.

    ArachnidFight

    16 users

  • Copy Title And Url

    Copy Title And Url

    アクティブなタブのタイトルとURLをmarkdown、pukiwiki、html形式でクリップボードにコピーします。

    ooyama2002

    16 users

  • at://wormhole

    at://wormhole

    Open at:// links or active tab URL in various AT Protocol tools and Bluesky clients.

    alice

    16 users

  • No Live Chat Youtube

    No Live Chat Youtube

    Remove live chat on youtube.

    chung

    16 users

  • Github Enhanced Project Board

    Github Enhanced Project Board

    An enhanced UI for Github project boards

    Firefox user 15024194

    16 users

  • Compress PDF to 200KB

    Compress PDF to 200KB

    A tool to compress PDFs to 200KB directly from your broEasily compress PDF files to under 200KB directly from your browser for quick sharing, storage, or email attachments.

    Anna Hash

    16 users

  • A11yFocus

    A11yFocus

    Quickly debug focus problems when testing a page for accessibility issues.

    Francesco De Stefano

    16 users

  • Whistle-Switcher

    Whistle-Switcher

    一款帮助开发者快捷切换Whistle代理规则的Firefox拓展插件。

    7gugu

    15 users

  • Clarityflow: Record screen & cam videos

    Clarityflow: Record screen & cam videos

    Record & swap screen, camera, and text messages on one threaded page. Message with clients and coworkers (replace calls & emails!)

    Clarityflow

    15 users

  • Script Injector

    Script Injector

    Custom script injection.

    Happy Code Time

    15 users

  • SEO Extension – All-in-One SEO Toolkit

    SEO Extension – All-in-One SEO Toolkit

    All-in-One SEO Toolkit (Premium): One extension for all your SEO needs. Run instant SEO audits on every page.

    Mert Doğan Gök

    15 users

  • 网页画图工具 Sketch-On-Page

    网页画图工具 Sketch-On-Page

    在任意网页上开启画图模式，支持自由绘画、擦除、调整颜色和线条粗细等功能

    碎影

    15 users

  • Etsy OpenSearch Engine

    Etsy OpenSearch Engine

    Search engine for etsy.com with a theme responsive icon.

    aminomancer

    15 users

  • Per-Site CSS Injector

    Per-Site CSS Injector

    Injects custom CSS to specific websites.

    matt chavoshi

    15 users

  • Voe M3U8 Catcher

    Voe M3U8 Catcher

    Captures M3U8 URLs

    René

    15 users

  • NOAuth

    NOAuth

    Identify OAuth flows and vulnerabilities

    Hacks and Hops

    15 users

  • Set Cookie: No secure - No HttpOnly

    Set Cookie: No secure - No HttpOnly

    Disable 'Secure' & 'HttpOnly' in set-cookie header

    ThomazPom

    15 users

  • HTTP Headers

    HTTP Headers

    A static offline searchable comprehensive reference for 95 HTTP Headers with descriptions and security details.

    Libor Benes (Dr. B)

    15 users

  • PX to VW

    PX to VW

    Easily convert PX to VW and VW to PX.

    CSS Unit Converter

    15 users

  • Gitpod Staging

    Gitpod Staging

    The developer platform for on-demand cloud development environments. Create software faster and more securely.

    Ona

    15 users

  • Checkbox Checker

    Checkbox Checker

    Checkbox Checker is a Firefox add-on designed to enhance your browsing experience by streamlining the management of checkboxes on web forms. This intuitive tool simplifies the process of selecting or deselecting multiple checkboxes

    Debet

    15 users

  • Simple Auto Clicker

    Simple Auto Clicker

    A simple auto clicker extension for Firefox

    Giga

    15 users

  • Selenium2Cucumber Converter

    Selenium2Cucumber Converter

    This Plug in converts the Selenium IDE scripts to Cucumber feature file.

    Shankar Laggishetti

    15 users

  • Luogu Tools

    Luogu Tools

    一些洛谷的实用工具

    MoonCake__MC

    15 users

  • Анализ мобильной версии сайта

    Анализ мобильной версии сайта

    Расширение позволяет просматривать в удобном формате страницы сайта в эмуляторе мобильного устройства.

    Alexander Pomozov

    15 users