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

Log in

12,590 extensions found in Web Development

Filter results
Search results
  • Last Tab

    Last Tab

    Allows you to switch to the last or most recent tab, Press Alt + Z You can also change the keyboard shortcut following this link https://support.mozilla.org/en-US/kb/manage-extension-shortcuts-firefox

    Mehedi Hasan

    162 users

  • Virtual Json Viewer

    Virtual Json Viewer

    JSON browser extension with virtual DOM, search and JQ filtering

    PS

    161 users

  • Lizard

    Lizard

    Select and remove annoying or unnecessary elements from a page. Great for printing and readability.

    arielg

    161 users

  • GitHub Web IDE

    GitHub Web IDE

    This extension enhances GitHub repositories by adding a convenient dropdown menu which offers direct links to various online platforms that allow users to view and interact with the repository's source code in an environment reminiscent of an IDE.

    zvizvi

    161 users

  • SecurityHeaders.io Analyser

    SecurityHeaders.io Analyser

    Click to show the score for the current page. Click again to show the full report on our site.

    Scott Helme

    161 users

  • FancyTracker-FF

    FancyTracker-FF

    A browser extension for monitoring and analyzing PostMessages and listeners in web pages.

    Erik Zettergren

    161 users

  • Flip Video Extension

    Flip Video Extension

    Flip any video on a webpage horizontally with a single click.

    xTeem_Fr0sTy

    161 users

  • File System Access

    File System Access

    The File System Access API allows web apps to interact with files on the local device.

    sycxyc

    160 users

  • Text to Speech

    Text to Speech

    Read any selected text in the browser with human-quality text-to-speech (TTS) engines

    Brian

    159 users

  • Search with ChatGPT powered by OpenAI!

    Search with ChatGPT powered by OpenAI!

    Adds a ChatGPT search engine. 'gpt' to start ChatGPT thread.

    zavage

    159 users

  • Wide GitHub

    Wide GitHub

    Change all GitHub repository and gist pages to be full width and dynamically sized.

    xthexder

    159 users

  • Febbox UI Token Grabber - willow

    Febbox UI Token Grabber - willow

    Gets the ui token cookie from febbox.com to use on willow

    Thingfoil

    159 users

  • showHTML

    showHTML

    This extension shows information about a web page's HTML elements as you hover over them. The details are displayed in a text stripe at the top of the screen. Clicking on the text stripe will toggle it between top and bottom placement.

    freginold

    158 users

  • tabdetach

    tabdetach

    Keyboard configurable detach, attach, merge and quick switch tabs

    Aethlas

    158 users

  • Copy image as Base64

    Copy image as Base64

    Allows you to copy an image to clipboard in a Base64 format data URI

    Syd Lambert

    158 users

  • LinkParser

    LinkParser

    LinkParser helps you analyze the links on the page you are on at that very moment. It can differentiate between 9 different types of links and can mark them in different colors. Very customizable.sdas

    seerobots

    157 users

  • OneDrive (Pin Tab)

    OneDrive (Pin Tab)

    Switch to OneDrive (Pin Tab) with a single click or a Hot Key (Alt+O)!

    Senthil Ponnusamy

    156 users

  • 网站 IP 信息查询

    网站 IP 信息查询

    查询当前访问网站的 IP 地址的地理位置，国旗，所属 ASN，端口开放信息等信息。

    北京天特信科技有限公司

    156 users

  • rep+

    rep+

    rep+ - Capture, modify, and replay HTTP requests in Firefox DevTools with AI-powered security analysis.

    Bour Abdelhadi

    156 users

  • UA Switcher

    UA Switcher

    User Agent Switcher is a powerful tool that enables users to simulate website access from different devices while helping developers test Bot blocking and spider crawling status, easily mastering website compatibility and security.

    mxdyeah

    155 users

  • Email Extractor

    Email Extractor

    Extract, view, and save email addresses from the current webpage.

    Libor Benes (Dr. B)

    155 users

  • GESIS Surf

    GESIS Surf

    Nehmen Sie mit GESIS Surf an wissenschaftlichen Studien von GESIS – Leibniz-Institut für Sozialwissenschaften teil

    GESIS Surf

    155 users

  • Gemini Chat Exporter - PDF, Markdown & NotebookLM

    Gemini Chat Exporter - PDF, Markdown & NotebookLM

    The ultimate Gemini AI exporter. Save chats as beautiful PDFs, Markdown, HTML, or TXT. Seamlessly send to NotebookLM or download locally with one click.

    TangerineKing

    155 users

  • Formlet

    Formlet

    Saving form data to bookmarklets

    jusuff

    154 users

  • Postwoman 中文版 - REQRES.CN

    Postwoman 中文版 - REQRES.CN

    为使用 Postwoman Web 版应用程序提供更好的体验。 你没用过 Postwoman 吗？这可是一个惊人的，免费、快速、漂亮的 API 测试请求工具。 请访问 https://reqres.cn/

    xlstudio

    154 users