Well, it would help if they would resolve the serious quality issues. I wrote a webpage the other day, fully standards compliant (at least as I read it), and Firefox got it completely wrong (one of the bugs, three days old and not triaged[0]) in a way Ed.
I still have open bugs in Firefox from 2012. Firefox is riddled with layout and scripting bugs. I don't understand how they can afford all of this experimental development and "outreach" stuff, when the core product is basically just accumulating bugs which they will never address. Their tracker is full of untriaged bugs from as far back as a decade.
It is virtually never required. Even Chrome's interpretation of undefined behaviours is convenient (i.e. margin: auto on elements with only a max-height; this doesn't work in EdgeHTML or Gecko)
I still have open bugs in Firefox from 2012. Firefox is riddled with layout and scripting bugs. I don't understand how they can afford all of this experimental development and "outreach" stuff, when the core product is basically just accumulating bugs which they will never address. Their tracker is full of untriaged bugs from as far back as a decade.
[0]: https://bugzilla.mozilla.org/show_bug.cgi?id=1511514