This includes the entire Servo team which was working on its next generation web engine that was supposed to be Firefox's ticket to staying afloat in the future. Servo also popularized the Rust language afaik
Aside from Servo, they also axed the entire threat management team, because why would a browser need threat detection and incident response, amirite?
Relevant links:
https://nitter.snopyta.org/directhex/status/1293352458308198401
https://nitter.snopyta.org/MichalPurzynski/status/1293220570885062657
https://news.ycombinator.com/item?id=24120336
https://news.ycombinator.com/item?id=24128865
So she was appointed in April. Since her appointment she's upped Executive salary and laid off 250, killed their future web engine and their threats department and is now focusing on money making strategies. This is the death of Mozilla. The execs are just going to run the corpse into the ground sucking every dollar out.