I love it, use that functionality all the time. For generic questions, and especially “How do I do X in Linux?” it’s amazing.

On mobile it is the most visible object on the screen, and very annoying:

Yes, me too. I was pointing out that SL can be used without Proton Pass.

Proton provides a SimpleLogin account, which is integrated with Bitwarden, so you can get the same functionality directly with Bitwarden too.

Bitwarden also integrates SimpleLogin for one-click alias generation.

I’m in their ecosystem but specifically don’t use it, as it seems extraordinarily unsafe to put my passwords behind the same authentication that I use just to check my email.

To add onto what Andromxda said, SimpleLogin is included with your Proton account (might be paid accounts only).

Use it with a custom domain - it’s amazing and if Proton Mail ever shuts down you won’t have to migrate any of your logins because they’re already on your own domain.