Microsoft claims, though, that the speed comes at a price -- a more vulnerable browser. A Microsoft spokesman told Ars techica that:
"With Internet Explorer 8, we made significant advancements and updates to make the browser safer for our customers. Given the security issues with plugins in general and Google Chrome in particular, Google Chrome Frame running as a plugin has doubled the attach area for malware and malicious scripts. This is not a risk we would recommend our friends and families take."Microsoft may have a point --- but they have also likely overstated the case. It's certainly true that add-ins can make a browser less secure. But the implication of Microsoft's statement is that there is the same amount of malware targeting Chrome as IE8, which is very unlikely to be the case. Ars technica accurately points out that because Chrome has such a small share of the browser market, malware writers simply don't take the time to target it; it's not worth the effort.
In addition, the site points out, even if IE8 with the plugin installed encountered malware targeting Chrome, there's a reasonable chance that IE8's underlying security scheme would halt it.
So while it's technically true that IE8 with the Chrome Frame plug-in installed may be theoretically less secure than IE8 without the plug-in, in the real world, there's likely not a great security threat.