I got a response from LogMeIn today about this. Per their e-mail to me: ''In chatting with another representative, I was told about something to check in Firefox that I didn't know about - if you go to Options > Advanced > General > Browsing > Use hardware acceleration when available and uncheck it - it might resolve your issue with Firefox 6.'' I admit, after doing this one simple step, I tested by using the Ignition app for iPhone, remoted my computer, and Firefox 6 responded flawlessly!