I'm mostly thinking of making Google the default search engine and not doing much of anything to stop its data-gathering out of the box (although I will give them credit for the Tracking Protection feature in private windows and not taking active steps to prevent people from protecting their privacy, what the hell Google), integrating the famously-invasive Pocket into the browser with no obvious way to remove it, and creating a new paid-exclusive AI help chatbot for web deevelopers that's just ChatGPT in a trenchcoat

Admittedly Mozilla's track record is light years better than any of the other software companies out there, and I won't begrudge them taking Google money in order to survive, but...