I don’t know if FF has changed in this regard but it takes a long time to get rid of a perception of poor performance and this should have been their first priority long ago (which seems to be the case with their Rust work and GeckoView/mobile preview browser). In addition to how far they were behind Chrome security wise for so long, such as isolated tabs.

But I agree, this should have been Mozilla's niche that they owned. Owning the early adopters is critical to mainstream success IMO. We're the ones that regular people listen to when making tech choices.