Very good, well done Firefox.

Very good feature, as usual by Firefox team.
Only missing the ability to delete relays to create new ones.

lacking documentation to fully explain it.
far too confusing to understand how it works.
EDIT: DOES NOT EVEN WORK AT ALL.
SKIP THIS GARBAGE 'FEATURE'!

only 5 alias 📨 please add more 💌📧✉📮📫📪📬📭

i love this, i suggest a rapid button for insert an existent alias, not only generate

Interfering with some normal logins where an e-mail has already been registered.

Great idea! I haven't actually tried it yet and I'm going to disable it. It's very frequently interfering with the usual "remembered" email addresses/passwords on websites. Specifically, visit a site, email address and password are filled in, click "login" or equivalent, site responds with "enter a valid email address". Sometimes I cannot get past that - I have found a workaround by accident - click twice. So until this add-on matures, I'll leave on the back burner . . .