This is not something I can control. This extension works by pretending to be an older browser, and if Facebook has errors for older browsers then I can't fix that, unfortunately.
I know it's a little soon to review an ad-on after using it only for a few hours, but since this seemlessly does exactly what it promised, I can't help but give it 5 stars.
Crossing my fingers that Facebook doesn't manage to break it any time soon.
