Rated 5 out of 5 stars
Thanks Wladimir, ABP 2.1 works fine with FF 10.0.5 ESR.This review is for a previous version of the add-on (2.1.1-signed). This user has other reviews of this add-on.
Probably but I recommend that you install the latest Firefox version nevertheless: http://adblockplus.org/en/requirements
Otherwise you might end up wondering why you are affected by a bug that nobody else can see. And newer Adblock Plus versions will require at least Firefox 13 eventually.