When does this problem occur, exactly? For example, when you:

• type the address into the address bar
• use a bookmark
• click a link in a page open in Firefox
• click a link in a different program that opens a new tab in Firefox

Or...

If the Yahoo site you get mentions DNS results, it may be a page that appears when there is a typo in the address or the server can't be found. Look around on the page (especially the very top or very bottom) for a way to opt out or cancel these kinds of results so you get a normal "server not found" error page.

Can you find anything like that?

It's also possible that this problem is caused by an add-on, perhaps one that snuck onto your system as part of a bundle.

In case one of your extensions is involved, could you test the page in Firefox's Safe Mode? That's a standard diagnostic tool to deactivate extensions and some advanced features of Firefox. More info: Diagnose Firefox issues using Troubleshoot Mode.

You can restart Firefox in Safe Mode using either:

• "3-bar" menu button > "?" button > Restart with Add-ons Disabled
• Help menu > Restart with Add-ons Disabled

Not all add-ons are disabled: Flash and other plugins still run

After Firefox shuts down, a small dialog should appear. Click "Start in Safe Mode" (not Reset).

Any difference?

It works when I go into Safe Mode, but if I run Firefox normally, it still brings up Yahoo.

It occurs when I use Ixquick search engine to look up ATF Cleaner. I then click on the official ATF Cleaner site. This brings up a page www.atribune.org and in about 2 seconds switches to Yahoo search with the following words in the search bar: a tribune space imagaes portal blue templates."

Hmm, our URL filter is blocking me from going to the site, so maybe it has been hacked?

I I had the same yahoo redirect issue on Firefox 31, Mac OSX 10.6.8 on a whole slew of links (on popurls, cnn but also random small sites)

The issue resolved when I found (and disabled) four add-ons (ALL by Spigot!) that I did not knowingly install: - Amazon shopping assistant by Spigot 1.7 - Ebay shopping assistant by Spigot 1.7 - Searchme 2.1 - Slick Savings 3.2

How did they get IN there? That is what I want to know...

How to just delete a reply HERE?

How about a simple "delete" button next to "edit" - similar to facebook...?