Anyone running a MAC? multiple cata waves per second on a MAc

I used to be able to set up my attacks in firefox, go offline, hit send, then go back on line, reload all tabs and tap spacebar really fast. this would send like 7 attacks per second.

fast forward to this week. my old computer is garbage and is about to die, so i bought a MAC despite swearing that i never would. I tried doing the firefox trick but the popup window to resend doesn't work nearly as fast as on my windows XP machine. the best i can do is one attack per second, which leaves me open for insertions.

So, if you are running a mac, what browser are you using to send cata attacks at the same time and whats your secret?
thanks

search it up it must be somewhere
its in the control panel for windows, its like this keyboard delay time, set it to shortest

or just use crtl-tab