If an extension in your web browser, triggered by a webpage causes a kernel panic, you have something far more concerning going on. A browser extension is not at fault here, even if it's helping trigger.
I would tend to agree but I have no idea what it may be. My system has been super stable since I got it 18 months ago. When I started having the problem I did a clean install of SL and as soon as I reinstalled Google Voice and navigated to Gmail, kernel panic. I swapped back the original HD and memory sticks and same problem.