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WorldIP - Geo Add-on with Security Features Requires Restart

Professional Geo Add-on with security features and advanced network tools. Anti-phishing. Protection against DNS spoofing and fake sites. All DNS records for domain. The real location of web server, country flag, extended information about datacenter

Rated 5 out of 5 stars (124)
14,501 users

Font Finder Requires Restart

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Rated 4 out of 5 stars (77)
19,964 users

Whois Lookup & Hosting & DNS & Site Flags Firefox Requires Restart

IP Whois Lookup & Website Reviews & Rating. Display country flag indicating website location. Alexa and Norton Antivirus Site Adviser. Supported: GoDaddy, NetworkSolutions, Dotster, 1and1, NameCheap, Register, Yahoo, 123-Reg, FatCow, Enom, FastHosts.

Rated 3 out of 5 stars (14)
2,742 users

MR Tech Toolkit Requires Restart

(Formerly Local Install) The primary goal of this extension is to provide the tools needed to install and manage extensions and themes locally and tons of other features.

Note: With Toolkit 6.0 Auto Archiving is fully working in Firefox 2.0 and temp...

Rated 4 out of 5 stars (134)
7,853 users

PrefBar Requires Restart

The all in one toolbar(item). Houses and manages bigger amounts of buttons (Clear Cache, Clear Cookies, ...), Menus (User Agent spoof...) and checkboxes (Javascript, Flash, ...). Extensible from online-database or with self created buttons.

Rated 5 out of 5 stars (42)
9,442 users

Live HTTP Headers Requires Restart

View HTTP headers of a page and while browsing.

Rated 4 out of 5 stars (203)
73,665 users

Copy Pure Text Requires Restart

Allows to copy selected text as plain text by adding a 'Copy as Text' menu item to context menu.

Rated 4 out of 5 stars (15)
3,577 users

Stylish Sync

Sync engine for Stylish with backup / restore facility.

Rated 5 out of 5 stars (31)
2,183 users

SQLite Manager Requires Restart

Manage any SQLite database on your computer.

Rated 4 out of 5 stars (268)
111,677 users

Firesizer Requires Restart

Allows you to resize the window to specific dimensions.

NOTE: Users of Firefox 29 and above must install "The Addon Bar" extension to use this, as Firesizer uses the add-on bar that has been removed in Firefox 29.

Rated 4 out of 5 stars (126)
11,623 users

Element Inspector

In the DOM Inspector,quickly navigate to the any elements

Rated 5 out of 5 stars (36)
2,412 users

jQuery Requires Restart

jQuery and jQuery UI embedded in browser

Rated 4 out of 5 stars (7)
1,508 users

User Agent Switcher Requires Restart

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Rated 4 out of 5 stars (311)
154,881 users

GitHub Extension Installer

Install Browser Extensions straight from GitHub Repositories

Rated 4 out of 5 stars (24)
1,204 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 (15)
4,644 users

HttpFox Requires Restart

An HTTP analyzer addon for Firefox

Rated 4 out of 5 stars (197)
38,348 users

RefControl Requires Restart

Control what gets sent as the HTTP Referer on a per-site basis.

Rated 4 out of 5 stars (180)
46,586 users

Proxy Tool Requires Restart

Proxy Tool - Powerful, yet User-friendly proxy tool to manage your proxies and anonymity needs, including: 46M+ user agents (world's largest), 10 different spoofed HTTP referrers, auto-proxy rotation, plus many more. Developed by http://ProxyList.co

Rated 4 out of 5 stars (46)
51,781 users