To me working with Apex 5.0 in Firefox is a bit of an ordeal. New browser instances opening all the time and in no time you don't know what is what anymore. But I'm sure it all come down to getting used to it.
But, what is really annoying is, that when opening a new tab I can't navigate to other websites anymore. Either the browser gives me a 302 message or it just won't do anything at all.
What is going on here?