Prevent someone watching Facebook images you are browsing.

The opacity recovers when you put mouse cursor over it.



● Twitter version:
https://greasyfork.org/zh-TW/scripts/399694-twitter-hide-image

● Youtube version:
https://greasyfork.org/zh-TW/scripts/400609-youtube-hide-video

● Instagram version:
https://greasyfork.org/zh-TW/scripts/400736-instagram-hide-image