If i have anti-virus and firewall software, is it still possible to get viruses whichever browser i

Best way to avoid virus's is to make sure your virus definitions are up to date. Sadly no software is 100% you should also consider some Anti Spyware software too virus's can get in through these, Anti Virus software dont pick them up :)

If i have anti-virus and firewall software, is it still possible to get viruses whichever browser i use?antivirus programs

Yes, hackers are geniuses and their main mission is to outsmart and outspeed any security provider. The trick is to constantly update and run scans (daily) on your computer programs. The best security program I found (and I've tried a lot) is Kaspersky's Internet Security 6.0 Once you get used to it, you'll love it. It doesn't let anything through and it updates every 2 hours.

If i have anti-virus and firewall software, is it still possible to get viruses whichever browser i use?computer protection

yes
I have used AVG Anti Virus, Zone Alarm Firewall, Spy-bot Search and Destroy and Ad Aware both spyware killers for years. They are all free for personal use and I have had no trouble with Viruses Trojans etc. AVG does not slow the system down as much as some other products and Zone Alarm allows a lot of personal configuration unlike the Windows Firewall. They can all be downloaded from the following link. http://www.computeractive.co.uk/ On the home page select downloads and then the appropriate category.I also use Windows Defender from the Microsoft site. It is safe to use two anti-spy products but never use more than one A/V as it can cause conflicts. You should run A/V and anti spy weekly. Hope this helps.
there is always a chance at getting viruses, but there are some things that you can do to help prevent them.