The difference is compact mode. In compact mode it replaces the favicon, in normal/touch mode it adds an extra line with the "PLAYING" text.

> an extra line with the "PLAYING" text.

If anyone knows how to turn this off, or prevent it moving the tab title up and down please let me know.

Pausing a video in one window then a second later having my attention drawn back to it by the movement is very annoying. I'm on xubuntu.

Interesting, here's what I see now on 89.0: https://imgur.com/a/bItmejF

I swear the "PLAYING" text wasn't there when I first updated. Seems like maybe they're still ironing out how to handle it.

FWIW, the playing text is longer in the localization I use, and when cut off (many tabs) it's not really readable. :)