Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
29,000 个用户
Grammar and Spell Checker - LanguageTool
With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
259,646 个用户
SponsorBlock - Skip Sponsorships on YouTube
Easily skip YouTube video sponsors. When you visit a YouTube video, the extension will check the database for reported sponsors and automatically skip known sponsors. You can also report sponsors in videos. Other browsers: https://sponsor.ajay.app
289,636 个用户
DuckDuckGo Privacy Essentials
隐私保护，操作简单。当您遨游于网络时，我们的插件所提供的隐私保护功能能够让您时刻掌控个人信息安全：跟踪阻断、更智能化的加密方式、DuckDuckGo隐私保护搜索等等。
1,690,156 个用户
NoScript 安全套件
您在网络浏览器中得到的最安全的保护！ 只允许在您信任的站点运行动态内容，保护您不受 XSS 点击劫持的攻击，并免遭“幽灵”、“熔断”等 JavaScript 漏洞利用风险。 在用 Firefox 52？https://noscript.net/getit
329,353 个用户
Simple Translate
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
240,819 个用户
ImTranslator - 在线翻译
ImTranslator提供的最方便的在线翻译超过50种语言访问。 ImTranslator包括在线翻译，词典，文本到语音，虚拟键盘，拼写检查，俄罗斯解码器，回译，电子邮件服务。
155,682 个用户
DuckDuckGo Privacy Essentials
隐私保护，操作简单。当您遨游于网络时，我们的插件所提供的隐私保护功能能够让您时刻掌控个人信息安全：跟踪阻断、更智能化的加密方式、DuckDuckGo隐私保护搜索等等。
1,690,156 个用户
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
262,422 个用户
TinEye Reverse Image Search
Click on any image on the web to search for it on TinEye. Recommended by Firefox! Discover where an image came from, see how it is being used, check if modified versions exist or locate high resolution versions. Made with love by the TinEye team.
64,001 个用户
Image Search Options
A customizable reverse image search tool that conveniently presents a variety of top image search engines.
47,869 个用户