I have a deep love-hate relationship with Mozilla. I want Firefox marketshare to grow, but it seems like many of the ventures that Mozilla has (like with Pocket) would just alienate the generally more technical audience that is still on Firefox. They've seemingly killed a lot of their R&D with the winding down of Servo, which is not a good sign given that they are struggling to keep up with Google technology-wise. The mess with MDN didn't send a great message either, though I don't know where that ended up.
Some of Mozilla's ventures seem cool. Like Mozilla VPN seems like a win/win; it supports Mullvad, you get a reasonable service, no complaints from me. But the thing that sucks is, Mozilla clearly needs to expand and build a large business to properly support Firefox, but their avenues for doing so in an ethically reasonable way that connects with the general mission seem pretty limited. Like it would be better if they could operate leaner and more directly focused on just building a good browser, but a lot of their options for monetizing Firefox itself are absolutely terrible. Ever since the whole debacle with using Firefox Studies to advertise, I don't even use upstream Firefox anymore. I do use Thunderbird and even donate sometimes, but I'm terrified that despite being donation-driven Thunderbird will somehow start to be enshittified too as part of their strategy to try to grow at any cost.
All of this signals, to me, a more general issue: it seems that maintaining a feasible mainstream web browser has become generally unsustainable.