Browser Has Issues With One Game Only...weird

A browser game I play just on my browser suddenly has issues after 3 months. Keeps doing the "Stop Script" thing, but ONLY on this game. Works fine on everything else, no issues.
I have run everything I can think of, AVG virus scan, SUPER Anti-Spyware remover, Malware Bytes, Windows Malicious tool remover, changed time out settings for browser, ran tweaking.com...nothing stops it. Start game, every ten seconds or so, message pops up "Stop script" thing. Very annoying. No game files are on my computer, it's all browser game, no download. (Sparta: War of Empires)
I'm so lost.
I would very much appreciate any suggestions.

 

dr. moriarity could be on the right track about extensions. If his suggestion about updating extensions/add ons doesn't work, try disabling your a-v browser extension and see if that fixes the problem. If not, try the others to see if it's one of them...