https://chromewebstore.google.com/detail/picture-in-picture-floati/adnielbhikcbmegcfampbclagcacboff
Picture in Picture - Floating player - Chrome Web Store
Picture-in-Picture mode allows you to watch a video in a floating window with playback video and volume controls.
picturefloatingplayerchromeweb
https://chromewebstore.google.com/detail/compact-floating-calculat/jlnfjjkgokpkkaibebmmjinbjblaedpc?hl=en
Compact floating calculator - Chrome Web Store
A compact floating calculator on any webpage
compactfloatingcalculatorchromeweb
https://dopda.kr/
Floating Store Buttons 2
floatingstorebuttons2