Based on the timing of initial tweets and blog posts on this fiasco, I'm pretty sure I was in the first 10%, if not first 1%, of people who experienced this. And I was in a plane at 36,000 feet trying to work on a cross country (U.S.) flight when suddenly about 130 tabs in 7 windows disappeared. Really, REALLY bad. Panic, frustration, confusion...
I was more than 50% sure that all was not lost forever, that it was some "glitch" (Extensions all showed the same bloody red status), but I was tweaked. I work in security (embedded systems, not computers/IT) so I have a very good understanding of certificates, TLS, PKI, etc. There are many ways things can get out of whack if the people in charge screw up.
Regardless, this is embarrassing, dare I say shameful (pretty much almost up there with "Ooooppsss... we just lost our domain - it expired and no one thought to renew it)
Come on, guys, get it together. Have a procedure, document it, practice it, stay in front of it.
EDIT: after installing the fixed XPI, I have to sadly report that all data has gone. All my carefully-managed containerized life was wiped clean. Heads should roll.
Complete shambles. And the worst thing is, I suspect it's all a plot to have more people opt-in to the shitty telemetry. Otherwise, why not push an update through the usual channels? Had it been a security-related fix, would have they used "studies"? I bet not.
I still prefer Firefox over all the other browsers, and will continue to use it, but the project has lost a lot of trust and goodwill over this.
The optics are indeed awful, and this was fully preventable. Firefox fucked up, full stop.