Web Development

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Policy Control (noScript, noCSS, noMedia, ...)

This extension helps you quickly disable and enable different types of resources such as JavaScript, CSS, and Media. The extension can be used to increase privacy as well as saving bandwidth by blocking unwanted contents.

Rated 4 out of 5 stars (14)
4,052 users

WhatRuns Compatible with Firefox 57+

Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.

Rated 5 out of 5 stars (16)
2,553 users

Proxy SwitchyOmega Compatible with Firefox 57+

Manage and switch between multiple proxies quickly & easily.

Rated 4 out of 5 stars (19)
957 users

Download all Images Compatible with Firefox 57+ Featured

a customizable extension to save the images from the current tab page

Rated 4 out of 5 stars (8)
2,069 users

NewScrollbars (aka NoiaScrollbars) Requires Restart

The "NewScrollbars"-extension replaces default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes".

Rated 5 out of 5 stars (92)
16,989 users

Vue.js devtools Compatible with Firefox 57+

DevTools extension for debugging Vue.js applications.

Rated 5 out of 5 stars (22)
4,415 users

Form Filler Compatible with Firefox 57+

This extension allows you to fill all form inputs (textboxes, textareas, radio buttons, dropdowns, etc.) with **random/dummy** data.

The purpose of this extension is to help developers test their forms quickly and easily.

Rated 4 out of 5 stars (6)
1,089 users

JavaScript Toggle On and Off (WebExtension) Compatible with Firefox 57+

Toggle JavaScript engine on and off the easy way

Rated 4 out of 5 stars (17)
3,428 users

Stylus (Beta) Compatible with Firefox 57+

Redesign the web with Stylus, a user styles manager. Stylus allows you to easily install themes and skins for many popular sites.

Rated 4 out of 5 stars (37)
4,751 users

Media Converter and Muxer (WebExtension) Compatible with Firefox 57+

Easy to use video and audio converter and muxer written in WebExtension built on top of the well-known FFmpeg converter

Rated 4 out of 5 stars (5)
2,584 users

Violentmonkey Compatible with Firefox 57+

Violentmonkey provides userscripts support for browsers.

Rated 4 out of 5 stars (35)
4,384 users

Open in Google Chrome Browser Compatible with Firefox 57+

Open current page or link in Chrome browser

Rated 5 out of 5 stars (11)
1,089 users

EditThisCookie Compatible with Firefox 57+

EditThisCookie is a cookie manager. You can add, delete, edit, search, protect and block cookies!

Rated 4 out of 5 stars (2)
2,330 users

Slither.io Mods, Zoom, Unlock Skins, Bots Compatible with Firefox 57+

The Best Mod and Extension for Slither.io! Mod Zoom, Play with Friends, Skins, Custom Skins, Bots

Rated 5 out of 5 stars (4)
1,039 users

Canvas Defender Compatible with Firefox 57+

Instead of completely blocking canvas fingerprinting, Canvas Defender add-on creates a unique and persistent noise that hides your real canvas fingerprint. This add-on protects you while browsing both in normal and private mode.

Rated 3 out of 5 stars (29)
4,356 users

ErrorZilla Plus Requires Restart

This extension is a replacement of Firefox official error page, which adds some useful tools to aid your troubleshooting.

The tools include:
- Google Cache (view the page cached by Google)
- Coralize (use Coral CDN proxy to connect again)
- Wayback ...

Rated 4 out of 5 stars (54)
1,310 users

Hackbar. Requires Restart

修改了浮夸的界面,爱护眼睛才是第一.感谢r0oth3x49升级!By Darkmelody.

Rated 3 out of 5 stars (2)
2,790 users

Modify Header Value (HTTP Headers) Compatible with Firefox 57+

Add, modify or remove a header for any request on desired domains.

Rated 4 out of 5 stars (8)
3,864 users

Zoom for Firefox Compatible with Firefox 57+

Zoom in or out on web content using the zoom button for more comfortable reading.

Rated 4 out of 5 stars (6)
1,121 users

Live HTTP Headers (clone)

View HTTP headers of a page and while browsing.

This is an unofficial "Live HTTP headers" clone, mainly to fix the Replay feature!

Rated 4 out of 5 stars (10)
7,015 users