Whenever I visit various website using Mozilla Firefox, the bottom left had screen shows webtrendslive in action. I know this is a spyware but my McAfree antivirus plus does not seem to identify this let alone removing it. I would welcome all the help I can get to get rid of this.
There are Firefox add-ons which will help. I recommend NoScript because it allows you to block elements of the content on a webpage. You could also try AdBlock Plus (which I don't use, so I can't give advice about the settings; but it's recommended HERE for killing Webtrendslive in FF). Browse the add-ons and see if there's anything else similar to AdBlock, then select the one with the best user reviews.