Why was disabling the "check for updates" "feature" disabled?
Ever since evolving past the 70's version, "Print to PDF" from Firefox has had sporadic problems. I have now three times "upgraded" to various 80's series releases and though sometimes Print to PDF works, it more often fails. Once again i have "downgraded" to a 70's release, and i do not experience flaws.
I have posted at least twice of the issue, yet no one is able, or has done anything, about it. Fine. But to keep getting that annoying "New version available" notification is as irritating as malware, especially since "upgrading" will cause the system to malfunction, and the choice to spend time by your programmers to eliminate a safe internal method to disable this is very confusing; why was the decision made to eliminate the option to turn that annoyance off, creating an annoyance when the only time one would turn upgrades off would be when there was a malfunction with a release?
I did find the external registry fix, which, compared to pre early 60's releases having the setting, was a waste of my time to find, but more importantly, added an outside element of a breach of security. I do not understand the reasoning in the development team's thought process.
Hello bem67. If you want to stay on an older version of Firefox the secure way to do that is to use the ESR releases, the latest of which is Firefox 78 ESR:
Since you say version 70 releases work for you, hopefully that one will help.
I can't speak to any decision made to remove a method to disable updates in the normal Firefox releases, but I believe it's not safe to have them disabled since updates are the only way that critical security updates are deployed.
Finally, this forum is for support using Firefox, not for making developers aware of bugs in Firefox. To make the developers aware of your issues so they can investigate and fix them, it would be better if you could create an account on https://bugzilla.mozilla.org/ and report the issues you're experiencing with printing there.
Note that ESR only receives security updates (current is 78.5.0) and there is no reason not to update. You can check the update channel via "Help -> About Firefox" or on the "Help -> Troubleshooting Information" (about:support) page.