I saw AutoPager on someone’s list of best Firefox plug-ins. After using it for a few weeks I’m hooked.
AutoPager detects all of those links to “Previous Entries,” “Older Posts,” and parts 2 through 20 and pre-loads the next page . As you continue reading and scrolling the page it loads the next page after that, and then the next. You never have to click a link to continue reading and you never have to wait for the next page to load. Sweet!
P.S. It works with Google search results, too.