I'm up to date - 25.0 I wouldn't think any of the add-ons being out of date would have anything to do with it, and besides I never update Chrome because I rarely ever use it.
Can you access the site from other browsers? If this is just limited to Firefox check any recent addons you may have installed, maybe clear all your internet cache too. Otherwise you'll have to check for malware or try reinstalling Firefox as a last resort.
I wonder what must have happened now because cleaning worked, yet I just cleaned it a few days ago. And yeah it was Firefox-specific - I could get to ALL on Chrome.