I feel like the first thing we should talk about is how this is effectively a keylogger, similar to Windows 10's inking and typing setting, albeit with likely poorer security. Collecting everything you type into a web browser (or MS Office) and sending it to them seems like a really bad idea.
Aren't all password managers keyloggers too?
It's eye-opening to people when I ask them about an extension they have, say "Honey", and they say they like it because it saves them money. And then I point out it can access everything they do online, and ask them if that's a concern or not.