13,081 extensions found in Web Development

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Xdebug Helper for Firefox
This extension is very useful for PHP developers that are using PHP tools with Xdebug support like PHPStorm, Eclipse with PDT, Netbeans and MacGDBp or any other Xdebug compatible profiling tool like KCacheGrind, WinCacheGrind or Webgrind.
Rated 4.2 out of 5
BrianGilbert_
13,238 users
Yandex Search
Adds Yandex for search engines
Rated 4.1 out of 5
KDev
13,169 users
Text Link
Allows URI texts written in webpages to be loaded by double clicks.
Rated 4.2 out of 5
Piro (piro_or)
12,987 users
Proxy SwitchyOmega
Manage and switch between multiple proxies quickly & easily.
Rated 4.5 out of 5
Firefox user 12962115
12,655 users
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
Rated 4.1 out of 5
tlintspr
12,227 users
Get cookies.txt LOCALLY
Get cookies.txt, NEVER send information outside with open-source
Rated 4.9 out of 5
kairi
12,145 users
Fake Filler
A form filler that fills all form inputs (textboxes, textareas, radio buttons, dropdowns, etc.) with fake and randomly generated data. The purpose of this extension is to help developers and testers test forms quickly and easily.
Rated 4.3 out of 5
Hussein
11,945 users
My IP Hider VPN
My IP Hider VPN is number one tool for hiding your IP and unblocking any web site! If your Firefox version is less then 55 please install older My IP Hider VPN from "Version History" (https://goo.gl/7ZQQjZ)
Rated 4.7 out of 5
MyIpHider.com
11,804 users
RESTED
A REST client for the rest of us
Rated 4.3 out of 5
Eline H
11,755 users
Lightning Autofill
The most popular autofill extension, boosting productivity since 2010.
Rated 3.3 out of 5
tohodo.com
11,536 users
Imageye - Image downloader
Find and download all images on a web page.
Rated 3.6 out of 5
Meagan Amrach
11,400 users
Header Editor
Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests
Rated 4.7 out of 5
泷涯
11,371 users
Flag Cookies
A cookie and browser storage data manager on steroids to mark, 'flag', and manage cookies using rulesets.
Rated 3.7 out of 5
Jan Riechers
11,251 users
PoE Overlay II Sync
Sync your Path of Exile 2 website session with PoE Overlay II
Rated 3.7 out of 5
Kyusung4698
11,150 users
javascript
add javascript that will run on this domain. back up your scripts in the options area (shortcut there by clicking the "JS" letters in the bottom right)
Rated 4.3 out of 5
chee
11,091 users
Save Screenshot
Saves the current page as image file or copies it to clipboard.
Rated 4.5 out of 5
Manuel Reimer
10,683 users
Netmirror Extension
Add, modify or remove a header for any request.
Rated 4.1 out of 5
Netmirror
10,622 users
Mobile simulator - responsive testing tool
Smartphone and tablet simulator on computer with several models to test mobile responsive websites.
Rated 3.8 out of 5
François
10,491 users
Modify Header Value
Add, modify or remove a header for any request on desired domains.
Rated 3.6 out of 5
Milen
10,044 users
Fonts Ninja
Speed up your design workflow!
Rated 4.6 out of 5
Fonts Ninja
9,868 users
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
Rated 4.4 out of 5
Lauri Rooden
9,705 users
axe DevTools® - Web Accessibility Testing
Add accessibility auditing to the Firefox Developer Tools
Rated 4.2 out of 5
Deque Systems Inc.
9,652 users
RESTer
A REST client for almost any web service.
Rated 4.8 out of 5
Jan
9,652 users
Empty Cache Button
Cache clearing made easy. One click.
Rated 4.5 out of 5
mvm
9,616 users
IP Address and Domain Information
The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.
Rated 4.5 out of 5
webdev7
9,574 users