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14,405 extensions found in Web Development

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  • Clockwork

    Clockwork

    php dev tools integrated to your browser

    its

    1,796 users

  • LiveReload - Web extension

    LiveReload - Web extension

    Web extension based version of LiveReload. Supports Firefox 57 (Firefox Quantum)

    Todd Wolfson

    1,794 users

  • FireMonkey

    FireMonkey

    Super Lightweight User Script and Style Manager

    erosman

    1,785 users

  • Word Counter

    Word Counter

    A lite tool for counting characters and words via context-menu

    Mark Lumnert

    1,766 users

  • SEO Analysis & Website Review by WooRank

    SEO Analysis & Website Review by WooRank

    Instant SEO analysis and website reviews for SEO, mobile, usability and social media. The freshest data when and where you want it.

    WooRank

    1,754 users

  • Smart Image Downloader

    Smart Image Downloader

    Download all images from the current webpage.

    Coder|M

    1,750 users

  • Amadeus Digital DNA Extension

    Amadeus Digital DNA Extension

    The Amadeus Digital DNA Extension provides end-users the ability to authenticate on some dedicated Amadeus web applications with a second factor.

    Amadeus IT Group S.A.

    1,747 users

  • Feature Queries Manager

    Feature Queries Manager

    Manage and toggle CSS on a page behind a @supports Feature Query.

    ireaderinokun

    1,742 users

  • Enable Selection and Copy

    Enable Selection and Copy

    Force enable text selection and copy. (mod by Gary) This is modded from another well-known addon and makes it function on local files also. Nothing else changed.

    GarryW

    1,740 users

  • dataslayer

    dataslayer

    Debug and test tag management (Google Tag Manager, Adobe Launch / DTM, Tealium) and analytics (Google Analytics, Adobe Analytics) implementations from within Developer Tools.

    Sean Adams

    1,736 users

  • Broken Link Checker

    Broken Link Checker

    A SEO tool to find broken (404) and redirected (301, 307, 308) links in all frames

    Balvin

    1,730 users

  • Dark Night Mode

    Dark Night Mode

    It is a universal night mode for the entire Internet. It uses a special algorithm to automatically change the colors of the websites you visit into dark mode so that you can browse without straining your eyes, especially at night.

    Dark Night Mode

    1,729 users

  • Clear Site Cookies

    Clear Site Cookies

    Clear the cookies of the current website, with cookie preview and precise cookie selection.

    William Wng

    1,727 users

  • Auto Refresh

    Auto Refresh

    Auto Refresh - Automatically reloads any page at the interval you choose. Lightweight, fast, and built to stay out of your way.

    SHUTDOWN

    1,705 users

  • Web Edit

    Web Edit

    Easily edit websites temporarily with a click of a button.

    Ryan Luu

    1,695 users

  • Try XPath

    Try XPath

    This add-on displays the result of evaluating XPath expression or CSS selector.

    larissa9839

    1,693 users

  • Claude Usage & Fable 5 Limit Tracker - UsageMeter

    Claude Usage & Fable 5 Limit Tracker - UsageMeter

    UsageMeter tracks your AI usage limits across Claude, ChatGPT & Grok. Plus 50+ themes, productivity tools, multi-account management & usage insights.

    Pilote Code

    1,685 users

  • GoFullPage - Full Page Screen Capture

    GoFullPage - Full Page Screen Capture

    Capture a screenshot of your current page in entirety and reliably—without requesting any extra permissions!

    GoFullPage

  • PixelZoomer

    PixelZoomer

    PixelZoomer takes a screenshot of the current website and provides various tools for pixel analysis. You can zoom into websites (up to 3200%), measure distances and pick colors with an eye dropper.

    Matthias Schuetz

    1,662 users

  • Asciidoctor.js Live Preview

    Asciidoctor.js Live Preview

    Render AsciiDoc (.adoc, .asciidoc) as HTML inside Firefox!

    Guillaume Grossetie

    1,662 users

  • APK Downloader

    APK Downloader

    APK Downloader Direct download apps of the Google apps store without using Google Play.

    Apkgk.com

    1,656 users

  • Free Visio Viewer (Mac, Windows, Linux)

    Free Visio Viewer (Mac, Windows, Linux)

    Open your Microsoft Visio files for free

    Lucidchart

    1,652 users

  • Remove Cookies Button

    Remove Cookies Button

    Toolbar button for removing cookies, local storage and session storage from the current tab. The button displays a number of deleted cookies (shown in the screenshot). In case of deletion problems button displays word "Error" and shows notification.

    foooobar

    1,648 users

  • Siteimprove Accessibility Checker

    Siteimprove Accessibility Checker

    Jumpstart your web accessibility efforts directly in Firefox. Is your web page accessible for everyone? Assess the accessibility of your web pages conveniently in Mozilla Firefox browser with the Siteimprove Accessibility Checker.

    Siteimprove

    1,645 users

  • Image saver

    Image saver

    Save any images in page directly from context menu, this includes svg elements, css background images and direct child images.

    Tom

    1,634 users