For those tired of visiting sites with little content and plenty of ads, this add-on marks with red all search result links leading to pages containing advertisements. The add-on automatically does the same job you would have to do manually to find out if a page has ads, i.e load the page and look for ads on it. If there are ads the search result link is marked red. In this first version the test is simple, but it will be more sophisticated in coming versions.
Note: Sometimes FF doesn't create 'page loaded' events, causing the extension to silently fail marking links. The remedy is to just do an update of the page.