no, not just firefox alone..
For good computer security you need to do 4 things.
1. Run a firewall.
2. Use a good anti-virus with real-time protection.
3. Do a regular scan with a dedicated anti-spyware,
4. Keep Windows and all your other installed software, 100% updated and patched with all important and security updates.
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My recommendations:
1. For the home user of XP or Vista, Windows Firewall is adequate, even more so if one is using a router, which is a very good firewall in itself. Make sure your Windows Firewall is turned "on".
2. For your Anti-Virus......(Always use only 1 A-V...You must NEVER use more than one anti-virus, Even an expired anti-virus can cause a major conflict...did I mention that you MUST uninstall any and all, old anti-virus products?)
Your AVG is alright but, I would suggest Avast, the newest version 4.8. Avast now includes anti-virus, some anti-spyware capability and anti-rootkit components. And all for the low low price of free. You can get it here:
http://www.avast.com/eng/avast_4_home.ht...
3. For your Anti-Adware and Anti-Spyware needs...
SUPERAntiSpyware:
http://www.superantispyware.com/
They have a free version.
4. Use Secunia PSI to insure that all your software is kept always updated and patched against vulnerabilities that are often exploited to compromise computers. Very important.
http://secunia.com/vulnerability_scannin...
Its free as is everything else here. Saving cash these days is important!
but :-
There is no such thing as safe virus and or malware protection. You could pay a 100 bucks for it and it still isnt going to protect you from all the crap out there. These companies have no idea whats out there for malware at any given time. At best, they have protection for known items. None of them know whats going to be a threat tomorrow. Consider a new form of malware comes out this week, it spreads itself all over the net and a month goes by before any of these companies become aware of it. Consider any kind of protection as being at best, 90 percent effective. I dont waste my time with any of it. I have been into computers for 30 years and on the net for 20. I can tell you that I've made enuff mistakes and had enuff infections to last me a lifetime. I tried the protection BS. Everything from free to expensive and still got malware. You know what I learned? Common sense is the best protection you can have....you download freeware, you WILL get burned, you use p2p and file sharing, you WILL get burned. You visit porn sites, you WILL get burned. I stopped using these so called protection softwares 5 years ago and with a little common sense, I havent had an infection since. I (although recently retired) ran a PC repair business and I can also tell you, people who say they have no malware on their PCs are dead wrong. I dont recollect ever seeing a pc come in that didnt have some form of malware on it. The pitifull part about it is people dont even realize they have it and pass it on to everyone else.