FF isn't needed for competition. There's Chrome, Opera, Vivaldi, Pale Moon, Safari, MSIE, Edge?
"Have you been living under a rock..... the latest firefox is using the same memory print as chrome which i actually do not like but that is another discussion."
One or two good releases of FF is not going to persuade people who left FF to switch back.
Generally only a few hobbyists are going switch browsers every time one beats another in some test. Switching, but to hobbyists the hassle is the attraction of their hobby.
For FF to regain customers who left:
1. FF is going to have to be noticeably better than what they switched to (be it Chrome, Opera, Vivaldi, etc., etc. apparently no lack of choices).
2. FF is going to have to build a track record of being consistently better.
That is a lot of choice besides Chrome, so FF isn't needed for competition. There's Opera, Vivaldi, Pale Moon, Safari, MSIE, Edge, and more.