They're 80% dependent on google there is no choice. Mozilla's behaviour since they got the google deal was the begining of the end. I honestly believe that due to Mozilla's current leadership it would be best for open source developers to all refocus on the ladybird project. I don't have any affiliation to that project and I understand how huge of an undertaking it is to build a web engine from scratch but the gecko engine is polluted by the Mozilla's execs and by extension Google.

To make it clear Google controls Firefox by, in practice, owning an 80% share of Mozilla.