Web Development

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Live HTTP Headers (clone) No Restart

View HTTP headers of a page and while browsing.

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

Rated 5 out of 5 stars (2)
1,705 users

Custom User-Agent String No Restart

Set custom User-Agent string. Also available for Firefox on Android.

Rated 3 out of 5 stars (8)
32,343 users

Emoji Keyboard No Restart Featured

A free Emoji Keyboard extension of the web tool http://emojikeyboard.org. This extension lets you input emojis right on the Firefox web browser of your computer.

Rated 5 out of 5 stars (32)
13,993 users

Live HTTP Headers (Fixed By ITWorld.com.pk)

View HTTP headers of a page and while browsing.
Live HTTP Header Fix By Danyial ITs Working On Firefox Again Fixed Reply Problem

Rated 4 out of 5 stars (5)
1,993 users

PAYAD.ME No Restart

Удобно и просто, без лишних действий, смотрите рекламу и получайте прибыль.

Not yet rated
1,067 users

Selection Links

Fetches all links inside selection for opening or downloading

Rated 4 out of 5 stars (43)
5,258 users

Simple Night Mode No Restart

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 (11)
1,071 users

about:addons-memory 2016 No Restart

Adds a new page that shows add-on memory usage

Rated 5 out of 5 stars (16)
5,849 users

Flash Debugger No Restart

Debug Flash/SWF/Flex files on the web. Edit properties and inspect elements on the fly. View log output inside the extension. Run AS3 code against the active SWF. Access assets with the Explorer, profile memory consumption and much much more...

Not yet rated
1,549 users

Access IranianUK in Iran

Bypasses the iranianuk.com filter in Iran.

Rated 5 out of 5 stars (1)
1,343 users

WebSocket Monitor No Restart

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 4 out of 5 stars (4)
2,105 users

Selenium Builder

Create automated cross-browser functional tests easily and quickly.

Rated 5 out of 5 stars (1)
3,463 users

Modify Header Value (HTTP Headers) No Restart

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

Rated 5 out of 5 stars (2)
1,497 users

RESTer No Restart

A REST client for almost any web service.

Rated 4 out of 5 stars (8)
1,344 users

Autofill

Autofill is a small but powerful add-on that serves one purpose: fill form fields automatically on page load. It is for people who just want a straightforward form filler without all the bells and whistles.

Rated 3 out of 5 stars (55)
27,885 users

Easy Copy Featured

Copy links to a page with one click, ready to paste anywhere else, eg. emails, blogs, forums and Twitter. Copy a single page, all open tabs or all links on a page.

Rated 5 out of 5 stars (34)
17,695 users

Fontface Ninja No Restart

Explore fonts within a website, try and buy them !

Rated 5 out of 5 stars (2)
1,810 users

Set proxy server with one click! No Restart

Set proxy server with one click! Visit Cool-proxy.net, the best resource of proxy servers and set your browser with one click.

Rated 5 out of 5 stars (1)
1,247 users

Tab Reloader (Page Reloader) No Restart

An easy-to-use tab reloader with custom reloading time settings for individual tabs

Rated 4 out of 5 stars (6)
2,421 users

JSON Diff View No Restart

Easily compare JSON objects. Highlight the differences using colours in a tree structure representing the diff.

Source code can be found at https://github.com/rafspiny/jsondiff/

Not yet rated
1,281 users