I'm running Firefox 83, and those options are still available. It's critically important that Firefox support disabling telemetry.
If you've edited those options via one of the lower-level preference systems, such as autoconfig.js, you may have locked them, which would cause them to show up as greyed out.
about:config and search toolkit.telemetry.enabled I checked on a fresh 83 and its greyed out.
You need to create the file firefox.cfg in install Dir and enter lockPref("toolkit.telemetry.enabled", false); To override it And to get that to work you need to create /defaults/pref/autoconfig.js with pref("general.config.obscure_value", 0); and pref("general.config.filename", "firefox.cfg.js");
Its getting harder and harder to make a good browser out of FF, I personally don't mind the work, but things like Lockwise replacing a working password manager without the needed options and no addons to fix it or workarounds, i can see it messing up fields in PasswordFox but can no longer do anything about it.
You seem to be diving directly to the low-level settings. I don't know why those would be locked, but the telemetry checkboxes in the UI work just fine, and aren't disabled. And once disabled, they'll stay disabled. Firefox is never going to prevent people from disabling telemetry.
The options in config were greyed out in 83.
> "proper menu system", do you mean..
The ability to make multi tier menu with icons or text instead of both
>Doing so would result in running an outdated
Doing so would result in a stable system that wouldn't just randomly disable all addons from working, security related addons at that.