I haven't played BF4 for 2 years and just installed the vanilla game this evening.
Origin should be up to date with version 10356379-0.
I use the x64 bit version of Firefox 50.1.0.
So I have firefox running, start Origin (even as admin, no difference) and then start BF4 which opens the Battlelog tab in the browser.
When I try to join a server or start anything, I get that error message:
It appears that DICE somewhat ditched Battlelog and I couldn't find any button to download the latest browser plugin.
Then I read about the option to "Use plugin-free game launching", which I ticked in.
„Origin Helper“ in Origin is activated aswell.
Still getting the same error. Is there any fix for this?