I'm obviously biased since I grew up with this "9,81" being a decimal, but in my head just thinking about it, it also makes sense. As you can see in these sentences, a comma is a break in a sentence, while a dot ends a sentence. Then again, math gets really messy when you have horizontal vectors with decimal numbers in-between, so maybe the dot is actually better idk. Eg: (2,3 , 4,5 , 3,7)

While the cops in Germany are a lot better trained and won't kill you or harm you, many are still on power trips and try to screw you over. Some abuse their authority especially towards teens and they try to fine you if you're an adult. Society needs that job, but man I rarely hear about good encounters with police. I feel like older people had a better experience with cops and younger people in Germany like the police a lot less, but I could be wrong.

I honestly don't think I found a website that doesn't work in Firefox for years. But I agree that it can be really annoying, I hope more people adopt Firefox (or it's engine at least).

As for your iPhone issue: Well Apple doesn't really allow any other browsers on iOS, AFAIK it's all just Safari under the hood with a skin on top.