Answers:
avast,avg,etc etc
You don't plinth an antivirus program rotten of which browser you are using as antivirus programs don't really guardianship. They work on your computer itself and not the browser.
The best, and free, is AVG and is available at
http://free.grisoft.com/
A PC wants 3 types of protection. Anti Virus, Anti Spyware, Firewall.
There is a guide on my PC assist site on; What you inevitability, Why you call for it, Where to grasp it.
All are free.
http://www.phpbbserver.com/stevie19605/v...
Don't concern if your using Firefox or any browser unless you're looking for browsers protection
AntiVirus: BitDefender (Real Time Scanner):
http://www.bitdefender.com/no/view/downl...
Firewall: Comodo:
http://www.personalfirewall.comodo.com/...
Anti-Adware, Spyware, Malware:
Comodo Anti-Adware (Real Time Scanner):
http://www.comodo.com/boclean/boclean.ht...
Ad-Aware 2007:
http://www.lavasoft.com/products/ad_awar...
Spybot-S&D:
http://www.safer-networking.org/en/index...
SuperAntiSpyware:
http://superantispyware.com/
AVG Anti-Rootkit:
http://www.grisoft.com/doc/download-free...
Ccleaner:
http://www.ccleaner.com/
All are free.
**NOTE**
Only own one antivirus program and one firewall installed on your computer.
Anti-Adware, Spyware, Malware are okey to hold more rotten.
Also download addons similar to Adblock Plus
http://en-us.www.mozilla.com/en-us/firef...
you will found several sites contained by this site which grant free anti virus programs try it
http://www.free4earth.com/free_software/...
Try
http://tipsfromruby-internetsecurity.blo... for further give a hand to preserve your computer protected beside regular virus protection and other related updates and report .