This is really uncommon outside of bigtech/VC startup companies' products. The only "misbehaving" Linux programs I can name from the top of my head are google chrome and postman (both which I no longer use).

This problem is unfortunately also prevalent in websites and it's even harder to evade.

I installed bare chromium the other day and it reset all of my defaults without asking. Brave asks every single time to be my new default BFF.

Librewolf doesn't ever say a goddamn thing and that's how it should be.