I guess replies on this thread are evident that Mozilla has lost much of the trust and goodwill it once enjoyed. Admittedly I am also very skeptical that Mozilla has the ability or genuine interest to make this work.
There is always a pile on on Firebox for not being perfect. Sometimes with valid complaints. But if you dig deeper nearly always the commenter is using a version of Chrome and justifies it over Firefox for a very shallow or outdated reason. Firefox would do well to listen to some of the criticism about the browser and ignore the noise about anything else There's also the cohort of bad web developers that only test on…
I'm using 3+ year old hardware that was mid-range even when it was new and it seems to do everything I would want with reasonable performance.