Changes

Hence, internal_browserver == server_browserver will trigger the sysupdate message, which appears to be the normal way to indicate that the current browser is outdated(see above).

Hence, internal_browserver == server_browserver will trigger the sysupdate message, which appears to be the normal way to indicate that the current browser is outdated(see above).

There seems to be some sort of cache for this in savedata?(The browser doesn't do this request every time a web-page is initially accessed)

There is a cache for this in savedata. The browser doesn't do this request every time a web-page is initially accessed. It seems the request is only done when at least 24-hours have passed since the last time the request was done(see the below savedata section).

It is still possible to guard against this update by blocking the previous URLs using a proxy.  

It is still possible to guard against this update by blocking the previous URLs using a proxy.