Yahoo seems to not provide API for germany. (only web site)

I use dbus to open the browser.
You can try this command line in xterm:
dbus-send --system --type=method_call --dest="com.nokia.osso_browser" --print-reply /com/nokia/osso_browser/request com.nokia.osso_browser.load_url string:"google.com"

I think it an issue with Browser Switchboard
With is the default browser ?
In the BS site, I read :
"...While MicroB is open, it will receive all links from other applications; closing MicroB will restore your chosen default browser."