I have been playing an online game for several months, I log on through my browser. Laptop running Win 7 Pro, Browser is Firefox Quantum 58.0.2 (64 bit). As of 2 hours ago, I can not get on to this game. I get this message: "An error occurred running the Unity content on this page. See your browser JavaScript console for more info. The error was: Uncaught RangeError: Maximum call stack size exceeded." I can get on to other websites, just can't log in to the game, which loads to 50% and stops, giving the above error message. I have repeatedly: logged out of game, cleared cache, cleared Browsing and Download history, gone to Tools-Options-Privacy and Security and cleared cached web content. Then I close browser, and shut down laptop. Wait at least 3 minutes, restart laptop, open Firefox and try to log in to the game. Same error message. I am stumped. I am not a computer tech person, have no idea what a JavaScript console is. How can I get back to playing my online game?