2732 was just enforcing default since at least FF52, and 2733 has never been used, was only there for info. Offline Cache or appCache (2730) is already behind a prompt (2731), and is already limited (in FF60+) to HTTPS (2730b).
Note: I am not 100% sure what happens with an app update. If this is divorced from that check now, you should be able to get FF updated without any system addons. We'll have to wait until 62 needs an update to test it. In the meantime I've edited the [NOTE]. I've also left this inactive (eg imagine if they pushed a critical update for formfill), so this is an end-user decision. Added to sticky to revisit this pref
I see no point in keeping this to enforce a default that FF itself doesn't use - see https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent/Firefox
- "... is an optional compatibility token that some Gecko-based browsers may choose to incorporate, to achieve maximum compatibility with websites that expect Firefox"
The last one-off ESR cycle of 8 releases is now behind us, new algorithm for FF60+ is back to 7 releases per ESR numbering, starting at 60... 67... etc. Note: This does not do anything for Aurora or Nightly spoofing the next ESR early (but we have until Nightly 67 before this becomes a problem). The ticket 1418162 was meant to cover this but instead was just used for the new algorithm. There is currently no ticket for the Aurora/Nightly issue - but never fear, Pants is here!! It is not forgotten, and I have emails with Tom Ritter et al on it
AS is out of control. No master switch in FF60+, and in order to 100% sure nothing is collected locally (or external connections made), there are now some 28 prefs (including those coming in FF61). This is re-DICK-ulous. We're not going to bother tracking all that, let alone the labyrinth of code. All users are advised to just make sure they remove the XPI every time they update FF.
