I also suspect a lot of the "Firefox is losing marketshare" is driven in part by ad companies, especially the huge one named Google. Given how many websites th

I also suspect a lot of the "Firefox is losing marketshare" is driven in part by ad companies, especially the huge one named Google. Given how many websites think Firefox in Enhanced Privacy Protection mode is "an ad blocker", of course ad trackers think Firefox is losing marketshare because it isn't feeding their trackers. Between that and how Mobile Firefox still has to use platform browsers (and a lot of user agent detection picks out the platform browser rather than the "user browser" on mobile), I'd be surprised if Firefox marketshare has dropped as much as the narrative believes. That said, even before Enhanced Privacy Protection and Mobile, Firefox was down in marketshare compared to the behemoth competitors, and so even if it is a trick of "Heisenberg metrics" that Firefox is losing marketshare, it probably could stand to gain marketshare (to push us away from the growing monopsony).