NEED HELP quickbooks on mozilla?

as everyone knows Internet Explorer is evil and insecure, so how could I run quickbooks on mozilla firefox? my mum is treasurer for her church and needs to use quickbooks, and it requires internet explorer 6, here is the error message it gives:
"You have reached this page because QuickBooks Online does not work with your browser, browser version, or operating system.

QuickBooks Online is available on the following operating systems only:

• Windows 98
  
• Windows Me
  
• Windows NT
  
• Windows 2000
  
• Windows XP
  
  

(Is there a Macintosh version? No, but learn more about an alternative.)

QuickBooks Online also requires version 6 or greater of Microsoft Internet Explorer. Click here to download the latest version.
To see which version of Internet Explorer you're using, from your browser's Help menu, choose About Internet Explorer.

If you believe you've reached this page in error, contact serviceconsulting@quickbooks.com"
please help me

 

you can't

 

didn't think so....
this sucks Internet Explorer is really fucking with my computer

 

it's not IE that hurting you....it's all the crud it allows in or thru

i'd download the free ad-aware and run it every night...it'll clean all that crud, unless you gotta virus

another thing to get, crap cleaner, another freebie...it'll polish things after ad-aware cleans them

you could also turn off directx in IE, that'll help a lot

 

k I'll turn off direct x
but yeah, I know why IE is bad, I didn't mean it itself was literally hurting my computer, just the fact that it is being used, I'm gonna up all of the security and stuff on it and all that fun junk
and I do have spybot, it's just a bitch to always have to deal with that shit

 

It's Active X..not DirectX. Just wanted to clear that up in case he can't figure it out.

 

yeah I already did... I thought something sounded fishy, but yeah.... taken care of