Peter G

I suggest setting up Timeshift so it can backup your drive daily and keep several days worth. This way when you or an update screws up your system, you can simply restore to the last working version.

Have you tried Waterfox? It satisfies most of your requirements, I believe.

I’ve been using Linux for more than a decade and distro hopped quite a bit. Mint used to be my happy place, but recently within the last 5 years or so I’ve been on Arch derivatives. Endeavour was never stable enough for my liking, but Manjaro has been great. I did have to go back to a snapshot once, fairly recently, but that was primary because I fecked it up and not due to an update.

You mentioned that you have tried several Arch-based distros, so I’m not sure if this includes Manjaro.