I can see some logic in this. Since X is the most populated service of its kind, it's more democratic, meeting people where they already are. Around the end of last year I updated to a crash-prone build of Nightly and while I was able to eventually find a bugzilla ticket describing and reporting the crash, checking places like r/Firefox and searchable Nitter instances (I haven't had a Twitter account in a decade and therefore can't view most posts unless I log in) was my first response in diagnosing whether it was an issue only on my end or not.

Anyway, Mozilla lost me a long time ago as a believer of their institution. They just happen to benefit from Firefox being the most well-supported FOSS browser.