Dear Mozilla, Please Remove This Annoying ‘Feature’ from Firefox

It's not new, I've been getting this for years when Firefox was updated in the background. I think it started when Firefox became multi-process and is intended to prevent different tabs from running on different versions of Firefox? But that's just speculation.

this has been implemented for years.

it has a been a continual nuisance on 'kiosk' style machines that I use Firefox on -- even better : it used to be that a browser restore after machine reboot would restore the restart-nag page; even if it was no longer valid.

it's end-of-the-world obnoxious for surveillance heads without human interface devices, and there isn't a lot of clean solutions to it other than schedule machine reboots with browser session wipes.

Side note : the "Your Firefox Was Just Updated!" new-tab opening are similarly disastrous -- what would be a small notification or toast in any other program is a full-page third-party-hosted website with multimedia on it ; fantastic -- but those tabs can be optioned out in about:config, last I checked there is no escaping the 'firefox was updated, restart' nuissance, other than drastically killing the auto-update functionality.

I have an impression that they force at least part of those "UI upgrades", to the point of removing their switch in about:config, specifically to annoy users and to create waves pushing their product into some news while showing off some work being done. There is no such thing as negative marketing or so people say.

Personally, I found almost none of those as useful as to justify the repeatedly broken web-surfing experience and ever-growing userChrome.css.