Comment 16 for bug 90378

I think you're missing the point. Firefox behaves correctly, OpenOffice probably doesn't. The fact that other applications might behave wrongly as well doesn't make it less wrong.

But apart from that: have you actually checked how other applications behave? Gedit for example already allows to edit a read-only file just fine. It correctly warns that changes cannot be saved and offers to save the file under a new name.