Option for chrome memory returns

Hello,
I notice while farming Lots in Chrome starts to run slower and slower. Each raid I hit adds about 50k to the memory used. If I hit enough it will be over 1 gig of memory. Hitting about 200 raids (open raid, hit for 1 stam, close, repeat) my memory usage went from 250M to 1 gig of memory used. If I hit the same raid (WR Pox was my test) over and over the memory does not go up.
So is there any options for chrome memory returns?
