I've noticed recently that there is no more Yahoo in my Firefox search plugin available. And when I press "install more addons", there is no Yahoo search addon on the list, only Yahoo Answer... Am I alone so lucky? Is it connected somehow to their Bing deal?
If I'm not mistaken, it's due to the current changes underway. Then again, you might want to just reinstall it and see what happens. Maybe you need to update your browser to the latest version?
I didn't lose mine also.. You might have accidentally removed it or somebody did it for your.. Or it is not compatible with your browser version.. Have you reinstalling it..? I guess that's the only way to know the problem..
I think the issue is about changes they made to it.. I am thinking that they have decided to take it off from there...
I think its working I have yahoo serach engine still there in firefox plug in, But don't know wheter its working with new version.