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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 (12)
5,249 users

The Addon Bar (Restored)

Gives you a place to put all your add-on buttons without over-crowding the navigation bar.

Rated 5 out of 5 stars (330)
77,197 users

Who is Hosting this Website? Compatible with Firefox 57+

Who is Hosting This Website is a free Add-on service for telling you- where websites are being hosted. "Who is Hosting this Website?" will also determine and display the IP address, DNS records and domain name ownership information (Whois Records).

Rated 5 out of 5 stars (12)
361 users

JS Print Setup Requires Restart

Client side Javascript printer settings.
This extension implements print setup from CS Javascript, similar of MeadCo's ScriptX ActiveX control for Internet Explorer.

Rated 5 out of 5 stars (32)
61,284 users

DNS Flusher Requires Restart

A Mozilla Firefox add-on that provides a easy way to reload the browser DNS cache.
It's commonly used by developers that uses the Hosts File to force a domain name resolution to a specific IP.

Rated 5 out of 5 stars (52)
15,209 users

Remote XUL Manager

Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.

Rated 5 out of 5 stars (37)
78,438 users

Free OmniGraffle (.graffle) Viewer

Open your OmniGraffle files for free

Rated 5 out of 5 stars (9)
235 users

LinkSidebar Requires Restart

View, search and test hyperlinks in a web page.

Perform group actions on multiple links like opening in tabs, copying link locations or testing to determine response times. Allows you to search/sort links and highlight their position on the webpage.

Rated 5 out of 5 stars (16)
1,197 users

StyleSheet Chooser Plus Requires Restart

StyleSheet Chooser Plus (aka SSCP) persists choice of website stylesheets.

Rated 5 out of 5 stars (17)
0 users

Fusebox 5 Reload Requires Restart

This extension (for Firefox 1.5 - 3.0) adds a menu item to the context menu (right-click) and the Tools menu to rebuild the Fusebox 5 memory structure and reparse the XML files. It includes the new (in Fusebox 5) options to loadclean and parseall. Yo...

Rated 5 out of 5 stars (17)
61 users

Transparent standalone images

This add-on renders standalone images on a transparent background, so you can see the image in all its glory!

Rated 5 out of 5 stars (40)
908 users

Element Properties Requires Restart

Returns the 'Properties' menu item that was removed in Firefox 3.6 to the context menu.

Rated 5 out of 5 stars (118)
957 users

View formatted source (format source extension) Requires Restart

Displays formatted and color-coded source and optional CSS information for each element. ...

Rated 5 out of 5 stars (22)
4 users

All About Location Bar Requires Restart

Make URL modification an accurate, smooth and simple experience

Rated 5 out of 5 stars (20)
138 users

5336游戏开服表 Requires Restart

网页游戏开服表提供最新,最权威开服数据.尽享玩游戏一站式便利.上5336游戏开服表,天下页游尽在掌握

Rated 5 out of 5 stars (14)
15 users

Proxy Switcher Featured

Access to the complete Firefox's proxy settings right from a toolbar panel

Rated 5 out of 5 stars (41)
32,424 users

Nuke Anything Enhanced Requires Restart

Allows you to hide almost anything via context menu 'Remove Object'.

Rated 5 out of 5 stars (138)
16,276 users

HostAdmin Requires Restart

Switch domain-ip mapping by a SIMPLE CLICK. In addition, DNS would be refreshed whenever your change host by HostAdmin or Manually.

Rated 5 out of 5 stars (27)
11,596 users

UnicodetoHTML Requires Restart

Converts selected unicode text to HTML character codes with right-click.

Rated 5 out of 5 stars (7)
154 users

AngScope Requires Restart

Simple Firebug extension that allows you to inspect the AngularJS scope that a DOM element binds to. This is not an official extension by the Angular JS team. It's something I wrote for me and my colleagues, I find it useful and like to share.

Rated 5 out of 5 stars (13)
5,903 users