Never had an issue with the stand alone setup. Also the first post in this thread has direct links to google with the x64 and x86 stable standalone files.
I don't know about Firefox but I've been using uBlock on Chrome since it came out and it works fine. Clear your browser cache and see ...
I am quite sure that you're not going to believe this but its 100% true, with the introduction of "HMTL-Edge" there is a very tight integration of ad blocking built right inside the core. So, there will be no nasty advertisements in Microshaft Edge though cant say much about NSA thing as its still wrapped under NDA. Hence, it negates the need of a full fledged ad blocker.