You have to separate the browser (I'm using it to type this), and the Mozilla corporation / C-suite. The C-suite at Mozilla took the Google firehose of money, spent most of it on their own salaries, followed by idiotic vanity projects, and spent least of all on the browser itself. Never mind building a warchest or anything responsible like that. It's quite rational to dislike what Mozilla managers are doing, while supporting Firefox as a browser and the developers and volunteers who make that happen.