bug report: now started making problems after a period where it worked quite find Rated 4 out of 5 stars

recently started to raise Java-Script errors of the form:
"Illegal operation on WrappedNative prototype object"

further seems to have dropped most of its functionality on pages. only shrinking of two column wide items seems to still work there.

this problem happened with firefox 22.0 and on facebook web sites as of today but even the effect happened on other websites as well. the affected plugin version was 2.0