As i have mentioned previously i am using tor browser as my main internet tool on a daily basis, i do not have other browsers on my home pc ( except for ie:D ) and this has the reasons which are nothing to do with maxcheaters website or video games at all.
I wouldn't like my software preferences to be judged by someone who's not representing the staff crew, with all the respect.
As about Firefox and Tor conflict. Yes, based on the Tor's description it is designed on some mozilla technologies ( i'm not a software or whatever guru so i guess if you are waiting for the reply of someone more competent than us, ask him kindly to investigate this possible case also)