Well , it's gotta be short and sweet , yet right to the point .
How about :
1- Firefox is a lying sack of sh** (classics , but won't pass the moderation , I guess)
2- Firefox sold it's soul to the commie devil, get alternatives ASAP !
3- Firefox hides the nastiest FSB telemetry under the hood, yet pretends to be "privacy oriented".
4- Firefox will fingerprint the hell out of you and send the results to KGB.
No. 2 is pretty close to your current name.
P.S.
Firefox , Palemoon, Mypal, Waterfox and all it's "forks" leak data to MS , Yandex , Amazon , Cloudfare , etc.
They will fingerprint the hell outta you , even if you have their "privacy resist fingerprinting" on !
See the attached images.