A few months ago, I had someone tell me on the programming subreddit that, while they were very concerned about privacy and Google Chrome, they tried Firefox but went back to Chrome because (and I am not making this up) the font kerning in Firefox was slightly suboptimal in certain situations.

That's what we're fighting against. This was someone on a technical forum who understood the privacy issues at play. But they valued their own privacy so little that they were willing to trade it for slightly improved font kerning. In short, I worry that we're well and truly fucked.