Youtube Watch Thumbnails EN
mosunset · Firefox
Display YouTube video thumbnails directly on the watch page. This extension automatically shows thumbnail images next to the channel icon, allows you to view all available thumbnail sizes, and provides a hover zoom feature. Click the thumbnail to
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简介
YouTube Watch Thumbnails
A browser extension that displays YouTube video thumbnail images directly on the watch page, making it easy to view and check all available thumbnail sizes.
Features
- Automatic Thumbnail Display: Automatically displays thumbnail images next to the channel icon on YouTube watch pages
- Hover Zoom: Hover over the thumbnail to see an enlarged preview (1.75x scale)
- Thumbnail View Page: Click the thumbnail to open a dedicated page showing all available thumbnail resolutions (WebP and JPG formats)
- Multiple Resolutions: View thumbnails in various sizes including maxresdefault, hq720, sddefault, and more
- Image Size Information: See the actual dimensions (width × height) of each thumbnail image
How It Works
When you visit a YouTube video page, the extension automatically:
1. Detects the video ID from the URL
2. Displays the thumbnail image next to the channel icon
3. Allows you to hover to zoom or click to view all sizes
The extension works on:
- Regular watch pages (/watch?v=)
- YouTube Shorts pages (/shorts/)
- All YouTube subdomains (www.youtube.com, m.youtube.com, etc.)
Privacy
This extension does not collect, store, or transmit any user data. All operations are performed locally in your browser. The extension only accesses YouTube pages to display thumbnail images.
Technical Details
- Built with React and TypeScript
- Uses WXT framework for cross-browser compatibility
- No external API calls or data collection
- Open source and transparent
Youtube Watch Thumbnails 是做什么的
Youtube Watch Thumbnails 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:Display YouTube video thumbnails directly on the watch page. This extension automatically shows thumbnail images next to the channel icon, allows you to view all available thumbnail sizes, and provides a hover zoom feature. Click the thumbnail to在Firefox 附加组件商店(AMO)上,它当前版本 4.0.0,约 32 名用户。
适合什么人用
从功能定位看,Youtube Watch Thumbnails 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。
怎么安装 Youtube Watch Thumbnails
- 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
Youtube Watch Thumbnails 是免费的吗?
Youtube Watch Thumbnails 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。
Youtube Watch Thumbnails 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。
Youtube Watch Thumbnails 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 Youtube Watch Thumbnails?
在扩展管理页找到 Youtube Watch Thumbnails,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
接口权限 2
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