problem with some wesites Rated 3 out of 5 stars

seems to conflict with some websites like yahoo news. Causes the page to hang - goes into 100% cpu usage. when I disable the add-on I can view the website.

When it does work, it works well.

This review is for a previous version of the add-on (2.1.5.1-signed).  This user has a previous review of this add-on.