Firefox extension that checks links for viruses

I just found this extension for firefox that adds a context menu when you right click on links that will scan the links for viruses with an online virus checker. I havent tried it yet (1 AM and I'm going to sleep). I plan to download this later. I think this could be a great thing especially for suspicious emails. Who know it could be the next must have addition to our virus/malware arsenals. Like I said I havent tried it yet so it could be a piece of junk but it's getting good reviews on mozilla.org.

Heres the link:

https://addons.mozilla.org/extensions/morei...numpg=10&id=938

I used it for about a day. It's so so, it's a waste of time checking the link though. it has to upload the file to Dr. Web then it will say or not. It will only do small files though. Sometimes it doesn't even work.