Gotcha. Well maybe you could do this asynchronously, after page load? Once the page is done loading, extension fires off for info about links on the page? As

Gotcha. Well maybe you could do this asynchronously, after page load? Once the page is done loading, extension fires off for info about links on the page? Assuming this didn't take to long, it might be doable before they clicked a new link. Also, extensions have access to cookies per domain? Maybe the extension could use this to cache results for a given page client-side?