Nah, while the annoyances are there they are generally unobtrusive and most users wouldn’t notice they’ve even there.

The real block to Firefox is out of Mozilla’s hands. Google pushes Chrome aggressively via their search engine - users get prompted to download and use Chrome. This is monopolistoc behaviour and the only way to tackle it is anti trust action. Microsoft is doing the same with Edge and it’s slowly growing market share as a result.

Sadly stopping that is not likely to happen. Maybe if Musk encourages Trump to continue the US case against Google, and/or the EU decides to wake up and regard browsers as important again.

All Mozilla can do is try and keep Firefox development going and keep the The organisation financially stable.