Encrypt all the things!

I used to do this, but self-hosted. It was insanely useful.

Then FF changed too much between versions, and so did python, the whole thing stopped being possible, and because nobody uses FF anymore (the fools), maintenance / development of it stopped entirely.

Which doesn't answer your question , but I don't care, you're not my mum.

Nope, no reason not to. It's end-to-end encrypted and has some nice features (like being able to open on desktop a tab that is open on mobile, etc).