Re: Oh please spare me
I agree with your comments and I upvoted you accordingly -- but the implication of the message "Your browser is being managed by your organization" when you are an individual home user and not expecting this is absolutely "Big Brother"-ly.
So is the follow-on message "Updates disabled by your system administrator" (they're not; the option of changing the setting from "Automatically install" to anything else is). The only other locked settings I've found in the Mint version are the options of making Firefox NOT be the default browser and of checking to see if it IS the default.
However, the messaging to the end-user is suboptimal and I was taken aback initially. The combination of Firefox's hardwired messages and the removal of options by Mint (for arguably benevolent reasons) can leave a perhaps naive user with a poor impression.