Or use Pale Moon, forked long ago and developed independently, that respects your privacy out of the box without needing 50 different 'hardening' Arkenfox type changes or having to keep watch every time Mozilla tries to screw over end users like this. Zero telemetry, zero advertising and no mental gymnastics over how we're financially dependent on Google but still value your privacy. And bonus, it retains XUL extensi…
The first thing that comes to mind when I hear "Pale Moon" is their toxic developers. But let's ignore that... Is it safe to use Pale Moon as your main browser? How many security patches is it missing from upstream Firefox? Do they have any security team? I don't mind using outdated software for a specific task, but I feel uncomfortable after a certain point. Unless you absolutely need the old XUL-era functionality,…
The only thing 'outdated' is their not jumping on the minimalist, mobile focused UI that Chrome invented and Firefox copied and retaining a sane, desktop user focused and fully customizable UI that doesn't need digging into about:config or userChrome.css tweaks and can be directly done from the preferences dialog or context menus. The way Firefox used to be until version 4 onwards when the copying Chrome and limiting user choice began. To your last point, why should you have to tweak Firefox for privacy at all when they keep proclaiming how privacy friendly they supposedly are? Pale Moon is private out of the box - there is no baked in telemetry (they don't run a telemetry server, for starters), analytics, tracking, advertising or anything else on those lines.