網頁全螢幕看影片 is a free Chrome extension developed by 4-x.tw. It falls under the category of Browsers and is specifically classified as an Add-ons & Tools subcategory. This extension allows users to watch videos on webpages in full screen or in a picture-in-picture mode.

With 網頁全螢幕看影片, users can enjoy watching videos on webpages in full screen mode. Additionally, it offers a picture-in-picture mode, allowing users to watch videos in a smaller window while browsing other content on the webpage.

Upon installation, this extension is automatically enabled. Users can simply move their mouse cursor over a video on a webpage, and a blue button labeled "網頁全螢幕" (Full Screen) and "子母畫面" (Picture-in-Picture) will appear in the top right corner of the video. Clicking on these buttons will activate the respective viewing modes.

The extension also provides convenient keyboard shortcuts for switching between full screen and picture-in-picture modes. Pressing F2 toggles the full screen mode, while pressing F3 switches to the picture-in-picture mode.

Please note that the full screen mode in this extension refers to filling the entire browser window, not the entire screen.

Overall, 網頁全螢幕看影片 is a useful Chrome extension for those who frequently watch videos on webpages. It provides an easy and convenient way to enjoy videos in full screen or picture-in-picture mode without the need for additional software or plugins.