The one killer feature Safari on a Mac has that keeps me from fully embracing Firefox is its integration with Messages for two factor security codes sent via text. In Safari, you don't have to jump over to Messages to copy and comeback to paste the code into the field. A box drops down under the field you can click on to autofill the code right there on the webpage.
Does Firefox have this ability somewhere or are there plans to add it soon? I seem to have read that Apple allows third party apps to add this integration since Big Sur.