Opera has bad security.
What do you mean...what do you access that needs constant securing? And the BROWSER doesn't go against viruses and stuff: it's the ANTI-VIRUS.
So, if you mean "security" for viruses, you're dead wrong. Off by 9001 miles.
If you mean for passwords and emails, then Opera is awesome at it. Wanna know why? Because it's a private Internet suite. Note the word "private". Private. Prrriiiiivvvaaate...