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

Log in

8,394 extensions found in Web Development

Filter results
Search results
  • Remove X-Frame-Options Header

    Remove X-Frame-Options Header

    Removes the X-Frame-Options header from all responses.

    Callaghan

    86 users

  • Medoro browser extension

    Medoro browser extension

    Extension for arranging web browser windows and tabs for smoother user's experience from our applications.

    Medoro s.r.o.

    86 users

  • Shopify Shop URL

    Shopify Shop URL

    Simple add on that help you to view the Shopify shop URL, active theme and currency information.

    Al Amin Khan

    86 users

  • (X)HTML5 Checker

    (X)HTML5 Checker

    A small extension to validate the markup of current webpage

    Francesco De Stefano

    86 users

  • MP4 Extractor

    MP4 Extractor

    Extracts all .mp4 files from a webpage.

    Alice Sn0w

    86 users

  • json-content-type-override

    json-content-type-override

    Allow to override any content type containing json to application/json. Can be very useful to override vendor specific content type.

    Clem

    86 users

  • Save Image in Preferred Format

    Save Image in Preferred Format

    Download any image in JPG, PNG, SVG, or WebP format directly from the browser.

    Raman Das

    85 users

  • Dreditor for firefox

    Dreditor for firefox

    An extension for Drupal.org that enhances user experience and functionality. Ported from Chrome extension by Mark Carver, Original author: Daniel F. Kudwien (sun).

    BrianGilbert_

    85 users

  • JAWSInspect

    JAWSInspect

    JAWS Inspect is a web developer tool that reports how JAWS screen reader “sees” and “reads” a web page.

    Vispero

    85 users

  • phab-conventional-comments

    phab-conventional-comments

    Adds a control in Phabricator comment toolbar to insert pre-defined label in the comment textarea

    nchevobbe

    85 users

  • Certificate Viewer for Humans

    Certificate Viewer for Humans

    Computers can read PEM encoded certificates. Hummans cannot. This extension might help. Try out on this page http://bit.ly/2oeUwEF Select the certificate, right click and 'Print certificate contents'. If no text is selected, it searches in clipboard

    Andrei Petcu

    85 users

  • CleanText Extractor

    CleanText Extractor

    Extract clean text from web pages by removing HTML and formatting

    J88

    85 users

  • SiteStacks for Firefox - Instant Tech Lookup

    SiteStacks for Firefox - Instant Tech Lookup

    SiteStacks lets you instantly look up the technology stack behind any website

    Siftery

    84 users

  • Alt Text Display

    Alt Text Display

    Add a context menu to images to show their URL and alt text

    codepo8

    84 users

  • AWS Favicons

    AWS Favicons

    Favicons for all AWS services

    Maddison Hellstrom

    84 users

  • RTL toggle

    RTL toggle

    Adds a reverse page orientation so that the text is more suitable for your language.

    trl toggle

    83 users

  • KOSHIAN 返信フォームを固定

    KOSHIAN 返信フォームを固定

    レスフォームの位置を調整します !注意! 一度でもフォーム位置切替を行ってた場合フォームがちらつきます FirefoxのオプションのプライバシーとセキュリティのCookieを管理から img.2chan.netやmay.2chan.netのreszcというCookieを削除すると解決します

    Pachira

    83 users

  • close tab right click

    close tab right click

    Close tab from right click context menu.

    kakakikikeke

    83 users

  • RDF Browser

    RDF Browser

    Request RDF files and render RDF files as Turtle documents with clickable links

    Kian Schmalenbach

    83 users

  • GitHub Issue Link Status

    GitHub Issue Link Status

    Colorize issue and PR links to see their status (open, closed, merged)

    Fregante

    83 users

  • Github Whitespace Disabler

    Github Whitespace Disabler

    Force Github to open diff pages without whitespace changes displayed. Inspired by: https://github.com/kemo/github-whitespace-disabler

    Oliver Maksimovic

    83 users

  • User Agent Editor

    User Agent Editor

    Change your user agent quickly and easily

    Francesco De Stefano

    83 users

  • AddHeader

    AddHeader

    add header This add-on would add custom header to HTTP requests. We can add headers to all requests or specific request for certain sites.

    Firefox user 13564830

    82 users

  • YouTube Miniplayer

    YouTube Miniplayer

    Opens YouTube links in a draggable miniplayer on non-YouTube websites. Simple. Easy. No fuss.

    Bukhari

    82 users

  • Proton Calendar Shortcuts

    Proton Calendar Shortcuts

    Adds customizable keyboard shortcuts (e.g., next, previous, today, ...) to Proton Calendar.

    Simon

    82 users