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IE Tab Requires Restart

IE Tab - an extension from Taiwan, features: Embedding Internet Explorer in tabs of Mozilla/Firefox...

Rated 4 out of 5 stars (1,217)
8,424 weekly downloads

BetterPrivacy-signed Requires Restart Featured

Control a new, trickier kind of cookie, better known as an LSO or Flash cookie. The BetterPrivacy safeguard offers various ways to handle Flash-cookies created by webpages with the help of your Flash plug-in...

Rated 5 out of 5 stars (421)
8,423 weekly downloads

User-Agent Switcher Featured

Quickly and easily switch between popular user-agent strings.

Rated 4 out of 5 stars (35)
7,427 weekly downloads

Element Hiding Helper for Adblock Plus

Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

Rated 5 out of 5 stars (431)
6,922 weekly downloads

Random Agent Spoofer

Rotates complete browser profiles ( from real browsers / devices ) at a user defined time interval. It includes many extra privacy enhancing options

Rated 5 out of 5 stars (145)
6,644 weekly downloads

RESTClient, a debugger for RESTful web services. Requires Restart

Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.

Please follow the link ("View other versions") below To install version 2.0.1.

Rated 4 out of 5 stars (102)
6,308 weekly downloads

Nimbus Screen Capture - editable screenshots

1) Screen capture web pages.
2) Selected regions.
3) Whole browser windows.
4) Slack direct upload (NEW!)
Edit screenshots and save images as local file or Google Drive. Annotate screenshots with different tools. Upload and share!

Rated 4 out of 5 stars (326)
5,535 weekly downloads

Cookies Manager+ Requires Restart

Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.

Rated 5 out of 5 stars (66)
5,504 weekly downloads

JavaScript Debugger Requires Restart

As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.

Venkman is the code name for Mozilla's JavaScript Debugger. Venkman aimed to provide a powerful JavaScript debugging environment for Mozilla based browsers.

Rated 4 out of 5 stars (50)
5,168 weekly downloads

HttpRequester Requires Restart

A tool for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.

Rated 4 out of 5 stars (65)
5,071 weekly downloads

ColorZilla Compatible with Firefox 57+

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Rated 4 out of 5 stars (376)
4,728 weekly downloads

Fire IE (FireIE, Enhanced IE) Requires Restart

Embeds Internet Explorer(IE) to use the powerful Firefox add-ons.
Not only an enhanced IE Tab, but also an enhanced Internet Explorer with Adblock Plus and FireGestures support.
Switch to the IE engine in one click and dismiss your IE.

Rated 4 out of 5 stars (191)
4,220 weekly downloads

HackBar Requires Restart

Simple security audit / Penetration test tool.

Rated 4 out of 5 stars (50)
4,112 weekly downloads

Proxy Switcher Featured

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

Rated 5 out of 5 stars (36)
3,833 weekly downloads

Hide My IP

Hide My IP is number one tool for hiding your IP and unblocking any web site!

Rated 5 out of 5 stars (33)
3,769 weekly downloads

Live HTTP Headers Requires Restart

View HTTP headers of a page and while browsing.

Rated 4 out of 5 stars (168)
3,763 weekly downloads

Open in Tor Browser Compatible with Firefox 57+

Open current page or link in tor browser for better privacy

Rated 4 out of 5 stars (10)
3,708 weekly downloads

User Agent Overrider

Override browser user agent string

Rated 5 out of 5 stars (60)
3,613 weekly downloads

JavaScript Toggle On and Off

Toggle JavaScript engine on and off the easy way

Rated 4 out of 5 stars (9)
3,578 weekly downloads

Wappalyzer

Wappalyzer is a browser extension that identifies software on websites.

Rated 4 out of 5 stars (99)
3,540 weekly downloads