The reason why I stopped playing FFR. Also seeking advice.

[MosaicMan3]

So out of no where about a year ago FFR got really laggy, to the point where I couldn't stand to play anymore. So I naturally gravitated towards other games.

But I still miss playing FFR.

I upgraded my mac to Yosemite, tried playing with chrome://flags, endlessly deleting anything I don't need on my computer to speed it up, yet FFR stays just as laggy as ever.

Any advice would be great, considering that I greatly miss playing...