OpenVPN browser tunneling
Make sure you have this --redirect-gateway in your configuration file.

That option is documented on the OpenVPN man page


 --redirect-gateway

Automatically execute routing commands to cause all outgoing IP traffic to be redirected over the VPN.

This option performs three steps:

    Create a static route for the --remote address which forwards to the pre-existing default gateway. This is done so that (3) will not create a routing loop.

    Delete the default gateway route.

    Set the new default gateway to be the VPN endpoint address (derived either from --route-gateway or the second parameter to --ifconfig when --dev tun is specified).

When the tunnel is torn down, all of the above steps are reversed so that the original default route is restored.