https://addons.mozilla.org/en-US/firefox/addon/redirect-control/ Redirect Control This add-on enables the user to allow or deny redirects from web pages. You can also create rules to allow redirects that you approve of.

Do you mean the close button in this ad (web page area)?

Best is always to try to close the tab via the close button of the tab or via a middle-click on this tab. If you open the results in a new tab by default via the search settings then you can easily go back to the search page if you close the tab(s).

"Do you mean the close button in this ad (web page area)?"

What ad? I'm not seeing your ad.

I search.

I open one of the results, in a new tab, because I think I want to read it. Not because I want to close it.

But instead, a pain-ad swoops in from the right.

I click the close button in the ad, and it redirects me to another site with a pain-video.

Between my disabilities, and their deception to get me to the video, I'm not going to watch their video.

I want to know if there's any way to block these sites.

Here's one of the front-end sites: (I've broken the link)

http://hannah rachelkatz.com/as-a-result-all-my-hearing-was-destroyed-and-i-had-super-bad-tinnitus-for-many-years/

Hewe's one of the video sites: (ditto)

http://tinnitus -terminator.net/video/?aff_id=13352&subid=hannahrachelkatz&suid=B6ax81v6PvgIwLceRg4jAsHw-%2Cc

Here's another: http://www.delices laurentiens.com/tag/mold/