lot of identical error messages Rated 3 out of 5 stars

Hard to view effectiveness, because I also use other means to block the +1 etc,

FYI:
I have a lot of identical error messages:
listener.getBrowserFromURL is not a function
ErrorConsole shows:
from priv3 overlay.xul
- - -line 48 -
var b = listener.getBrowserFromURL(url);
- - - - - -

I don't know the effect of these errors
I use a load of extensions, I did not search if one of them is related to the errors

This review is for a previous version of the add-on (0.11).