Google Lighthouse
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
15,606 人のユーザー
Поиск Яндекс
Добавляет Яндекс к поисковым движкам.
14,760 人のユーザー
テキストリンク (Text Link)
Webページに書かれたURI文字列を、ダブルクリックするだけで読み込めるようにします。
14,662 人のユーザー
Lightning Autofill
The most popular autofill extension, boosting productivity since 2010.
14,132 人のユーザー
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)
14,101 人のユーザー
RESTED
A REST client for the rest of us
13,571 人のユーザー
Chrome Mask
Makes Firefox wear a mask to look like Chrome to websites that block Firefox otherwise.
13,417 人のユーザー
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
12,555 人のユーザー
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)
12,289 人のユーザー
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.
12,107 人のユーザー
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
11,982 人のユーザー
Export Cookies
Export cookies to a Netscape format cookies.txt file.
11,928 人のユーザー
Flag Cookies
A cookie and browser storage data manager on steroids to mark, 'flag', and manage cookies using rulesets.
11,755 人のユーザー
Allow CORS: Access-Control-Allow-Origin
Easily add (Access-Control-Allow-Origin: *) rule to the response header.
11,436 人のユーザー
Header Editor
Manage browser's requests, include modify the request headers and response headers, redirect requests, cancel requests
11,266 人のユーザー
モバイルシミュレーター
モバイルサイトのテストに使用できるいくつかのモデルを備えた、コンピューター上の非常にリアルなスマートフォンシミュレーター。
11,111 人のユーザー
Empty Cache Button
Cache clearing made easy. One click.
10,976 人のユーザー
Modify Header Value
Add, modify or remove a header for any request on desired domains.
10,872 人のユーザー
IP Address and Domain Information
The Ultimate online investigation tool! See detailed information about every IP Address, Domain Name and Provider.
10,790 人のユーザー
Fonts Ninja
Speed up your design workflow!
10,764 人のユーザー
RESTer
A REST client for almost any web service.
10,312 人のユーザー
Proxy Toggle
Toggle between direct connection and a single proxy server via a toolbar icon.
10,151 人のユーザー
MobiDevTools
A mobile devtools for debugging web sites and applications with the console, DOM, network info, sources, and more.
9,868 人のユーザー
Angular DevTools
Angular DevTools extends Firefox DevTools adding Angular specific debugging and profiling capabilities.
9,582 人のユーザー
Save Screenshot
Saves the current page as image file or copies it to clipboard.
9,239 人のユーザー