Some counter-points for those of you who want to dig further:
- Louis Rossmann video - goes over Mozilla's likely motivation, California's CCPA
- Louis Rossmann's wiki page about it - very in-depth, more-so than the video
So there are two explanations here:
- Mozilla is in CYA mode due to potential violations of the CCPA (details on the bill)
- Mozilla decided to turn evil
Both are certainly possible, but given that the vast majority of Mozilla's funding is from the Google search partnership, I think the former is more likely.
Regardless, I believe Mozilla is scummy, especially since Rossmann points out that Firefox development could be sustained on only investment returns of the org. Here's the relevant portion of the above video where he discusses that (specifically this timestamp, where he goes over their 2022 and 2023 returns, but the earlier bit is instructive as well).