Dark Reader
すべてのウェブサイトにダークテーマを適用します。夜間や毎日のブラウジングにDark Readerを使用し、あなたの目を気遣います。
1,068,779 人のユーザー
Ghostery – プライバシー広告ブロッカー
Ghosteryは強力なプライバシー拡張機能です。広告をブロックし、トラッカーを阻止し、ウェブサイトを高速化します。
927,289 人のユーザー
FoxyProxy Standard
FoxyProxy は Firefox の限定的なプロキシ機能を置き換える、高度なプロキシ管理ツールです。SwitchProxy や ProxyButton、QuickProxy、xyzproxy、ProxyTex、TorButton などよりも多くの機能を提供します。
192,126 人のユーザー
Tampermonkey
Tampermonkey is the world's most popular userscript manager.
644,893 人のユーザー
ColorZilla
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
142,926 人のユーザー
User-Agent Switcher
Easily override the browser's User-Agent string
63,184 人のユーザー
Cookie-Editor
Cookie-Editor lets you efficiently create, edit and delete a cookie for the current tab. Perfect for developing, quickly testing or even manually managing your cookies for your privacy.
60,678 人のユーザー
Cookie Quick Manager
An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.
59,399 人のユーザー
Ruffle
Flashを元の場所に戻します。
49,976 人のユーザー
Allow Right-Click
Re-enable the possibility to use the context menu on sites that overrides it
41,897 人のユーザー
Disable JavaScript
Adds the ability to disable JavaScript for specific sites or specific tabs. You can customize the default JS state (on or off), the disable behavior (by domain or by tab) and much more.
35,107 人のユーザー
WhatFont
A wrapper for Chengyin Liu's WhatFont tool
33,745 人のユーザー
Disable WebRTC
WebRTC leaks your actual IP addresses from behind your VPN, by default.
26,993 人のユーザー
cookies.txt
Exports all cookies to a Netscape HTTP Cookie File, as used by curl, wget, and youtube-dl, among others.
16,180 人のユーザー
Google Lighthouse
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
15,796 人のユーザー
RESTED
A REST client for the rest of us
14,727 人のユーザー
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
13,807 人のユーザー
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
13,707 人のユーザー
Empty Cache Button
Cache clearing made easy. One click.
12,605 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)
12,296 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.
11,517 人のユーザー
Proxy Toggle
Toggle between direct connection and a single proxy server via a toolbar icon.
10,432 人のユーザー
Emoji Cheatsheet
A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook. Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard.
10,365 人のユーザー
WhatRuns
Discover what runs a website - This Firefox extension helps you identify technologies used on any website at the click of a button.
8,502 人のユーザー