Looking For Firefox Addon Shows My Domains
 

I'm looking for a firefox addon that will highlight a list of my domains in the search results when hand checking my positions on google. Anybody know of anything available?

I think that no exists a such addon.

It's not really what you asked for, but if you download webceo (it's free) then, amongst many tools, you can view your domains and where they ranking in a number of search engines for your chosen keywords.