Spatial Navigation in Browser

[abusaadp]

I am creating a browser for accessibility and am using your spatial navigation to make the pages navigable with keyboard. I am able to inject your JavaScript code for the onload event of the first website added to my browser and the navigation works fine. For subsequent link clicks in that page I am not able to inject your JavaScript code and hence the spatial navigation is not working. How to make the spatial navigation to work in all pages? (even for pages opened by clicking on the links in the first page).