There is also a local proxy server (cannot remember the name but it has been around since the late 90s) that can do the same for any browser. Last time I looke

There is also a local proxy server (cannot remember the name but it has been around since the late 90s) that can do the same for any browser. Last time I looked at it, it was not intelligent and would preload every .html link on the page, plus any .css or .js they referred to.