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WebSocket Monitor

WebSocket monitor is an extension for Firefox developer tools that can be used to monitor WebSocket connections in Firefox. It allows to inspect all data sent and received.

Rated 5 out of 5 stars (11)
4,807 users

Simple Night Mode

An addon to invert the color of any webpage/website, making contents of any website readable and less stressful on your eyes if you are surfing internet in dark lit room. After installing addon, just right-click & select 'Night Mode On'

Rated 5 out of 5 stars (28)
4,721 users

Task Manager

Task Manager to see the CPU and Memory usage of the tabs, works best when using e10s to be able to see the total process memory usage.

Rated 4 out of 5 stars (16)
2,616 users

Selenium Builder Requires Restart

Create automated cross-browser functional tests easily and quickly.

Rated 5 out of 5 stars (4)
5,808 users

Clear Cache Requires Restart

Clear Cache was developed to make it easier for Web development, clearing your browser cache (RAM and DISK) by pressing a button or via the F9 key.

F9 Fever! ;)

Rated 5 out of 5 stars (28)
21,284 users

Web Developer Toolbar Button Requires Restart

Add "Web Developer Tools" button in toolbar.

Not yet rated
5,103 users

Cache Disabler

A simple add-on which provides a button to completely disable (and re-enable) disk and/or in-memory caches with a single click.

Rated 5 out of 5 stars (5)
1,049 users

BugzillaJS - Tweaks for Bugzilla

BugzillaJS adds a number of features to Mozilla's Bugzilla. Keyboard shortcuts, quick file box, inline image/github previews, relative timestamps, gravatars and more. (All features are optional; contains almost all features Bugzilla Tweaks has)

Rated 5 out of 5 stars (11)
1,036 users

Trello Card Numbers

Display card numbers in Trello.

Rated 5 out of 5 stars (1)
1,222 users

View Dependencies Requires Restart

View Dependencies adds a tab to the Page Info window, in which it lists all the files which were loaded to show the current page.

Rated 4 out of 5 stars (35)
3,822 users

React Developer Tools

React Developer Tools is a tool that allows you to inspect a React tree, including the component hierarchy, props, state, and more. To get started, just open the Firefox devtools and switch to the React tab.

Rated 5 out of 5 stars (7)
18,546 users

Asciidoctor.js Live Preview

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

Rated 5 out of 5 stars (4)
1,589 users

Image Zoom (ugly fixes) Requires Restart

An ugly attempt at fixing Image Zoom

Rated 3 out of 5 stars (8)
1,097 users

CORS Everywhere Requires Restart

This is a firefox addon that allows the user to enable CORS everywhere by altering http responses.

Rated 4 out of 5 stars (10)
9,059 users

Selenium IDE: Flow Control Requires Restart

A flow control plugin for Selenium-IDE

Rated 4 out of 5 stars (3)
5,433 users

File Logging (Selenium IDE) Requires Restart

A plug-in for Selenium-IDE to save log to a file

Rated 4 out of 5 stars (8)
7,249 users

Scrum for Trello

Scrum for Trello adds functionality to the awesome trello.com for use in Scrum projects.

Add estimates or record time-spent directly on Trello cards. Shows sums at the top of each list and the top right corner of each board.

Rated 3 out of 5 stars (11)
5,460 users

InspectThis Requires Restart

Inspect the current element with the DOM Inspector.

Rated 5 out of 5 stars (9)
1,878 users

Signature /Auto Paste /Prefill Fourms Requires Restart

Makes everyday entries to forms & forums simpler!
Add a sig. with just a Rclick of the mouse and select 'Add Sig.' from the context menu.
(Please, note: What you see in the pic is only an example. ThoseRMine Sorry, you have to make your own tabs. )

Rated 4 out of 5 stars (24)
4,489 users

Omnibug Requires Restart

Firebug extension for web analytics testing and debugging

Rated 4 out of 5 stars (4)
5,109 users