1. When I learnt about the corporate structure at Mozilla. I simply don't drust any large corporation with matters related to privacy.
2. What happened with Brendan Eich. That just wasn't cool. What someone does in his personal time is non of my business. Virtue signalling of any sort, to me, is a hallmark of the wrong crowd in power. As far as I could see, Eich refused to bend the knee which is an admirable quality considering the fact that internet privacy is an uphill battle against giants.
3. Lack of innovation and getting in bed with Google. If Firefox needed money, all they had to do was just ask. How can they, when they have to pay a CEO millions of dollars.
Now I'm primarily using Vivaldi. Sometimes Brave. I'd support a small, talented and a focused team anyday.