Firefox

Oh speed is definitely going to be the make-it-or-break it here. I do usually know the name without thinking, but it's having to type it (and preferably without typos) that's the effort that would be nice to save.

It feels really stupid, because it's really not that much effort. But I know myself - I also really like contactless payments, even though it really wasn't that much effort to insert my card and type in my PIN. Yet it's a small convenience for something that I do with some regularity. I imagine the same for this feature.