The problems I experienced that can be fixed in Firefox itself probably already got fixed.
My (personal) problem with Firefox is that functionally it's not Chrome and doesn't look/feel like it. The claimed non-functional improvements (privacy, freedom, ...) DON'T make up for the difference for me personally.
If Firefox looked and felt more or less exactly like Chrome for the functional parts then I would not have any problem switching for good. It's not at the moment, so this is what stops me from adoption.
I don't propose to change anything (you did). I was merely stating why I'm not on Firefox yet as a data point.