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

Log in

11,209 extensions found in Web Development

Filter results
Search results
  • Invisible Video Downloader

    Invisible Video Downloader

    Silently downloads all video resources on page load

    KURAI

    695 users

  • Favicon Detector

    Favicon Detector

    A simple way to detect website icons.

    BlackGlory

    694 users

  • Penetration Testing Kit

    Penetration Testing Kit

    Attention! This version is no longer supported. Use /firefox/addon/owasp-penetration-testing-kit/ extension instead.

    pentestkit.co.uk

    693 users

  • Assistant RGAA

    Assistant RGAA

    Extension de navigateur permettant d'auditer des pages web en suivant le référentiel RGAA.

    Boscop

    692 users

  • SnowEyes

    SnowEyes

    洞悉无形，守护无界

    Sickle

    689 users

  • Random password generator

    Random password generator

    A simple random password generator for Firefox browser

    Matija

    686 users

  • Bug Magnet

    Bug Magnet

    Right-click context menu to help with exploratory testing

    Gojko Adzic

    685 users

  • Request Interceptor

    Request Interceptor

    Intercept HTTP and HTTPS Requests. Add custom rules to modify request/response headers, block/redirect requests, modify query params. Example Usage: This extension can be used to block all ads having url (*/ad.x.com/*) by creating rules

    Vinay Kaparthi

    685 users

  • SQLite Reader

    SQLite Reader

    Easily browse, edit and manage SQLite database inside your browser!

    Loori

    684 users

  • RDS bar (seo: pr, dmoz, alexa, seomoz)

    RDS bar (seo: pr, dmoz, alexa, seomoz)

    RDS Bar is a handy tool for quick analysis of website and page SEO indicators, designed for webmasters and optimizers. And also with a number of useful features for ordinary users.

    Recipdonor

    683 users

  • Disable CSP for a minute

    Disable CSP for a minute

    Temporarily disables CSP for the current tab's website. Right click on the page, then disable CSP.

    python273

    680 users

  • Permanent Inspect Element

    Permanent Inspect Element

    Save the changes you make to a page with Inspect Element so they wouldn't go away after refreshing

    BreezB

    678 users

  • Toggle Cache

    Toggle Cache

    Disables or enables the browser cache.

    Manuel Reimer

    674 users

  • SugarMelt

    SugarMelt

    Allows you to change font/style; also adds cheats

    Lure of Chaos

    672 users

  • CSS Stacking Context inspector

    CSS Stacking Context inspector

    Helps inspecting the css stacking contexts and solving the z-index war.

    Andrea Dragotta

    671 users

  • Cloudflare Optics

    Cloudflare Optics

    Cloudflare Optics is a browser extension that helps display interesting information when you visit a site, particularly if that site is proxied through Cloudflare.

    Cloudflare

    670 users

  • Live Reload — monitor and reload html, css, js

    Live Reload — monitor and reload html, css, js

    Addon for web devs. Monitor included JS, CSS and/or HTML in frames and automatically reload the host page when a change is detected in the included source. Supports inline reloading of stylesheets and frames without reloading the host page.

    Blaise Kal

    668 users

  • OdooTerminal

    OdooTerminal

    Terminal for Odoo (v11-18. CE & EE) Works on backend & frontend (with limitations) Press "CTRL + ," to toggle terminal or use the browser action icon.

    Alexandre

    665 users

  • Custom CSS

    Custom CSS

    Overwrite or inject custom CSS into website.

    Kenny Ooi

    663 users

  • es-client

    es-client

    elasticsearch管理客户端

    云落天都

    659 users

  • Github Repository Size

    Github Repository Size

    Add repositories size to their GitHub summary band using the GitHub public API.

    Matthieu Harlé

    657 users

  • Table Extractor - TableConvert

    Table Extractor - TableConvert

    Instantly convert tables on any webpage to multiple formats

    Fechin

    656 users

  • Font Inspector (WebExtension)

    Font Inspector (WebExtension)

    Click on any element to get the font info in a page popup

    Alex

    649 users

  • Reading List/ Reading History Exporter

    Reading List/ Reading History Exporter

    Export your lists and reading history to CSV, HTML, JSON, or PDF.

    RaidenOQ

    643 users

  • Code Editor

    Code Editor

    Powered by the Monaco Editor, it provides support for basic syntax colorization, IntelliSense, validation and Diff Editor features.

    sycxyc

    642 users