I knew this "built-in addon" from the experiments/flags site some time ago and loved how beautiful it worked now with nearly all pages.

However, it seems like the google applications (google doc, tables, presentations, etc.) still don't work yet. (https://imgur.com/a/Z56KeCH (Screenshot of named problem))
That's really too bad because I have to use them a lot.

Hopefully we will see some fixes for these pages and for similar cases.