Firefox development process is so bad/slow. New features will take ages to appear. Mercury, Bugzilla are old relics and the review process is from the 90's and

Firefox development process is so bad/slow. New features will take ages to appear. Mercury, Bugzilla are old relics and the review process is from the 90's and very strange. I think that is one of the reasons they copied functions to XPCOM instead of fixing them in NSPR. It was easier to add new stuff than get a review to fix existing code.