Sure but people decide Mozilla is not meeting their standards and then switch to.... Chrome. (Or a browser based on chromium which is just a filtered version of Chrome).
the people complaining about firefox are not switching to chrome! they just keep complaining. don't know where you took that wildly inaccurate idea from.
people who don't complain about mozilla sorry state do move to chrome tho.
There is a certain type of poster that says they use Chrome because of X Mozilla thing, almost like it's a rationalization. Certainly not everyone complaining about Firefox of course!
My least favorite thing about Firefox is the "you must restart Firefox to keep browsing" message when my package manager updates it.