bigpinkdragon286 :
The largest problem with browser security just happens to be the people who are using the browser, not the browser itself. Grandmaster, I suspect your mother-in-law would have just as happily downloaded her virus using Firefox, if she was using that at the time. Most problems computers get into are do-it-yourself, and blaming the computer or it's software for the initial problem, isn't going to help. Furthermore, since when did any browser launch code from banner ads? Are you talking about Internet Explorer 6 that shipped with Windows XP? Also, the security of other browsers may not be a feature at all, but a lack there-of. What browser do you turn to when you need to run an ActiveX control?
You are just flat out wrong.
This is from Norton's current Threat Spotlight.
http://us.norton.com/security_response/
Threat Spotlight: Trojan.Ransomlock
Trojan.Ransomlock is a detection for Trojan horse programs that lock the desktop of a compromised computer making it unusable.
The threat may arrive on the compromised computer by various means, such as visiting malicious sites, by opening untrusted links or advertisement banners, or by installing software from untrusted sources.
These programs attempt to convince the user to pay money in order to have their computer unlocked and use a variety of different techniques in order to encourage the user to pay the ransom.
More information on Trojan.Ransomlock is available in the Trojan.Ransomlock writeup.
Infection
This threat is distributed through several means. Malicious websites, or legitimate websites that have been compromised, may drop the threat onto a compromised computer. This drive-by-download often happens surreptitiously. Another method used to propagate this type of malware is spam email containing infected attachments or links to malicious websites. The threat may also be downloaded manually by tricking the user into thinking they are installing a useful piece of software. Ransomware is also prevalent on peer-to-peer file sharing websites and is often packaged with pirated or illegally acquired software.