They’re losing market share because they’re not bundled with {OS of choice} / not heavily pushed on you when you visit a Google property

And because they are wasting their time on these side quests that could have been spent improving the actual browser.

Which standards and are they actually standards or just some “draft” slop from Google?

For example Firefox could fix it's issues with VSS crashing on GPU's so that Linux distros like Nobara don't have to ditch Firefox as the standard browser in favour of Brave. Granted, that would only get them back a couple of hundred users but hey: marketshare?

For example since firefox doesn't support WebNFC I can't do online shopping because during 3D secure my phone can't recognize my credit card being tapped. I have to use Chrome instead. Frankly, I don't care if WebNFC is "slop" or not. It's solving real world problems.

WebNFC is a draft standard.