A message keeps popping up saying JavaScript Application and under it uninstal set. How can I get rid of it?

The box keeps popping up every time I bring up a new page or refresh a page, saying at the top JavaScript Application and at the bottom uninstal set. Don't know how to get rid of it. Can someone help me?

I had this problem too, drove me crazy until my son figured out that it was just Firefox (we also use Internet Explorer)...I looked on the help site & immediately saw that others had the same problem.
First I did the "DISABLE Java Console 6.0.22" that did not work, so I disabled the Yahoo toolbar (as another user had mentioned). I don't know if it was just the last thing, or both...but the annoying pop up is gone! Yaaay! It only took a few minutes.
Firefox Help is great! Thanks to those who post their fix, it does help the rest of us!

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