Web Developer Tools EN
SessionManager.net · Firefox
500+ Web development tools to inspect, debug, edit, test, optimize and audit websites. Privacy-first developer utility.
<all_urls>），意味着它可以读取你在任意站点的页面内容，包括已登录的页面。这是许多扩展正常工作的必要条件，但也值得你确认来源可信。
截图
简介
Web Developer Tools is a modern, privacy-first toolbox for web developers, frontend engineers, designers, QA testers, accessibility specialists and SEO professionals. Inspect, debug, edit, test, optimize and audit any website without leaving Firefox.
550+ developer tools, organized into clear categories:
- 🔍 HTML & DOM inspection and debugging
- 🎨 CSS inspection, visualization and live editing
- ⚙ JavaScript debugging, console capture and page analysis
- 🌐 Network, request header and resource inspection
- 💾 Storage, Cookies, Cache & IndexedDB managers
- 📈 SEO auditing and metadata analysis
- ♿ Accessibility (WCAG) inspection
- ⚡ Performance and Core Web Vitals analysis
- 🔒 Security header and HTTPS inspection
- 🖼 Image, Form and Responsive Design utilities
- 📱 PWA inspection and manifest validation
- 🧩 Technology detection
- 🎯 Color, typography and design tools
- 📄 Data formatting, generators and validators
- 🖥 Browser environment and page utilities
🔒 Privacy first
Every tool runs entirely on-device: the page data the tools read — DOM, CSS, cookies, headers, storage — is shown to you in your own browser and is never uploaded to us. We do not collect browsing history, keystrokes, analytics or telemetry of any kind. The extension contacts our servers only for the two things you choose to use: optional account sign-in (used solely to manage a Pro subscription) and the built-in feedback form, which sends only the message you write and the email address you optionally provide.
✨ Why you'll love it
- 550+ organized developer tools in one extension
- Privacy-first — no unnecessary data collection
- Fast, lightweight and easy to use
- Works on virtually any website
- Available in 11 languages
- Powerful free features with optional Pro upgrades
Whether you're debugging layouts, inspecting HTML and CSS, auditing SEO, testing accessibility, analyzing performance or managing browser storage, Web Developer Tools provides everything you need in one place.
Web Developer Tools 是做什么的
Web Developer Tools 是一款面向 Firefox 的开发者工具类扩展，主要用来调试页面、查看样式与请求、测试接口、辅助前端开发。官方对它的介绍是：500+ Web development tools to inspect, debug, edit, test, optimize and audit websites. Privacy-first developer utility.在Firefox 附加组件商店（AMO）上，它当前版本 1.3.2，约 149 名用户。
适合什么人用
从功能定位看，Web Developer Tools 更适合前端工程师、测试与需要经常查看页面结构的用户。如果你平时只是偶尔遇到相关需求，用浏览器自带功能也能凑合；但如果这件事每天都发生，装一个专门处理它的扩展通常比手动操作省事得多。需要注意的是它作用于所有网站，装上后建议先观察一两天，确认不影响常用站点的正常使用。
怎么安装 Web Developer Tools
- 打开Firefox 附加组件商店（AMO）上的官方页面；
- 点「添加到浏览器」并确认权限提示；
- 装好后在扩展列表里固定图标，方便随时开关。
本站只做索引与介绍，安装包来自官方商店。如果商店页面提示当前地区不可用，说明该扩展未在你所在区域上架。
常见问题
Web Developer Tools 是免费的吗？
Web Developer Tools 在Firefox 附加组件商店（AMO）免费提供下载。它是浏览器扩展，装上就能直接用，不需要注册账号。
Web Developer Tools 安全吗？
它只申请了 0 项权限，范围比较克制，没有申请「读取所有网站数据」这种大权限。
Web Developer Tools 支持哪些浏览器？
当前收录的版本来自Firefox 附加组件商店（AMO），适用于 Firefox。同一个扩展在其他商店可能有对应版本，但功能与版本号不一定相同。
怎么卸载 Web Developer Tools？
在扩展管理页找到 Web Developer Tools，点移除即可。它在本地保存的设置会一起清掉，不会残留数据。
权限清单 来自 manifest.json 原文
站点访问 1
<all_urls>
接口权限 7
activeTabbrowsingDataclipboardWritecookiesscriptingstoragetabs