Once RV is properly configured as your rvlink: protocol handler, this link should launch RV and display a standard SMPTE colorbar image.
You can also test RV's "one-click sync" with these links (only on linux and windows). First click here to start your "sync target" RV (make sure no other RVs are running before you click). Then click here to sync with the previously started sync target.
As of RV version 3.8.6, a new "fully baked" URL format will be supported by RV. This form of URL will be much more resistant to munging by evil browsers. Here's an example of such a baked URL.
Please Note: the rvlink:// protocol is supported by RV version 3.8.4 and later on all platforms.