Number my Google SERP results?

[MarkWidawer]

I'm looking for a Chrome or Firefox extension that does something simple...I just want to number the listings that Google returns on a page.

Simple, right?

I don't want to use a separate SEO tool for this, or even go to some other site to check my rankings. What I"m looking for is, when I go to Google, I see a number next to each listing that is returned on the page. (A bonus would be for it to also work on Yahoo or Bing...but then again, who ever uses those, right?)

I just want to look at the page and be able to see "Hey, that site came up 9th for this keyword" without having to count one by one. This would be an especially handy tool when using Advanced search and listing 100 on a page.

I figure there's got to be an extension that does this. Isn't there?

Thanks, in advance, for your suggestions.

--Mark