Safari960 - A grid overlay extension for Safari

I've used various grid bookmarklets in the past, but they always do a lot more than I need and I never like the defaults. Yesterday I finally decided to roll up my sleeves and scratch my itch by making a very simple grid overlay extension for Safari.

It's available for download here and the code is on . If you like it, help me improve it!

Update: Changed the download link to point to the project page.