Mind you that Firefox will adjust it to be able to fully support ad blocker.

So true… Not only sometimes it makes it hard to find the translated function name (especially since they are adding a lot of new functions) but there are quite often longer… For instance in French you go to a simple ifs to si.conditions…

Maybe there is something I don’t understand but is it possible to install and use macOS safari version on iOS? I don’t understand how it can be a good / serious argument from Apple ???

I would think to be compliant with regulation you should effectively be able to install an alternative on your device? Which I believe is possible since there is a firefox on iOS. Even though as far as I know all browser on iOS are powered by the same underlying engine.