I could. Those bits are fairly simple though. Often a small payload is sent to a server containing the version of the browser (and often the OS). The server res

I could. Those bits are fairly simple though. Often a small payload is sent to a server containing the version of the browser (and often the OS). The server responds with a link to download the newer bits (if necessary). A couple of the threads I shared touch on this briefly. The only difference, if I recall correctly, was that some of the browsers would check for updates to the updater too.