People on here love to moan about Firefox because Mozilla did one thing at some point in the existence of the company they didn't like. But then just cede the Internet to Google and chromium clones because at some point when they were a crappy junior JS dev, Chrome had some better tooling over Firebug so they just got used to testing in one browser. Maybe they also like to remember how Firefox, a decade ago, couldn't handle 1000 tab sessions.
I hope Firefox keeps up the fight but HN loves to crap all over them for not being perfect.