Some Improvements Rated 2 out of 5 stars
This would be great if it worked with paged webs and not only images, so if you are in a forum thead like:
and you click the next button, you'll get to page 559
Or if you're in a Wordpress blog like http://www.mywordpressblog.com/page/104/ you could go to page 105.
It would be as simple as analysing the URL and altering the rightmost number in the URL.
Unfortunately it would not work for Google search results since the page number is not the last number in the URL, but it could even be customized for certain popular cases like Google Search by identifying the URL, recognizing it is a Google search and altering the correct number, not the rightmost one.
Then this would be a great and very useful add-on.
Another improvement would be using arrows instead of eyeballs and relocatable buttons instead of a new toolbar.