I finally gave up on firefox a year ago, after being a lifetime user. I can live with it being slightly slower than other browsers but it had strange hangs and very slow loading sometimes that made me switch and didn't find in other browsers.
It could be an extension, that specific about:config setting or sometinhg else but i switched to have a browser that doesn't require me troubleshoot this stuff.
Well the cve noted in the article requires local access so either stacking exploits, having access to the machine or dropping usbs and hoping someone plugs it in.
These changes are a pain but i have mostly achieved a copy of my Windows 10 setup which is much needed to stay productive!
Getting the old right-click menu back is done through a registry setting.
Reverting the taskbar back to Win10/2000 style for things like ungrouping of task bar items, items in multiple rows, items with titles and a quick launch area i use this: https://github.com/valinet/ExplorerPatcher
This only relates to cyclist/vehicle strikes and not to solo accident due to handling, road conditions, weather etc.
Additionally (without having checked any statistics) i believe most vehicle strikes where i live are due to the driver not seeing the cyclist at all, because they do not orientate properly on right turns or the cyclist is riding too aggressively.