IP Address isn’t extremely precise, and I always run on the latest version of whatever browser I’m on, be it Safari or Edge.
I don’t believe they can provide firmware updates once the chipset loses support, which is bad for security. (The same also applies for every other manufacturer, but Fairphone claims to update their phones for a longer time).
It’s unfortunate that Fairphone sucks in other ways (such as having limited firmware updates due to using an old SoC, as I understand it).
Not on iOS it doesn’t. They explicitly opt out of even iTunes backups made locally.