Here is a search result I did for Ebay. BTW happens only with Goggle search.

You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.

Ell it seems that the culprit is everywhere YouTube downloader.

Why does this happen is it software conflict or just plain malware.

I wish Mozilla would keep tabs on these issues.

Thanks

It’s very sad, but many of the software downloaders / installers will trick you into installing not only their program, but other programs as well. You have heard of the fine print in shady contracts, right? Well, some installers you need to look at the itsy bitsy teeny weeny fine print. You are thinking you are giving the installer permission to install the program you want by using the recommended option. But if you use the Manual Option Instead, you discover all kinds of stuff that you do not even know what it is or what it does. From now on, everyone needs to Use The Manual Option to put a stop to this.

Thanks FredMcD.

I've always read the fine print on software install but never thought of doing the same with ad-dons.

Will look closely now.