Patch 34 updates this feature. Mouse input is now supported, including scrolling. If a clicked-on link opens a page in a new window, or if the URL starts with “steamhttp://” (see http://www.tornbanner.com/announcement/ ), or if a URL includes “OpenInSteamOverlay” (could add it as a parameter, like http://www.google.com/?OpenInSteamOverlay ), then the link will open in the Steam overlay. Keyboard input is not routed.
Crashes related to this feature should now be resolved and we’re no longer calling it “experimental”
Thanks for adding more features for server owners. I’ll be testing this addition shortly.