link opens up with wrong browser in kde

[Hans <hans.ullrich@loop.de>]

Hi folks, 

I am looking for the configuration or the file, where kde (or an application) 
stores its linking to an url.

The problem is, that I want open all links out of applications with the same 
browser.

For example, a link in mediathekview is opened with opera, a link in kmail2 is 
opened with iceweasel. Sometimes chromium also is started.

I set update-alternatives --config x-www-browser to iceweasel, but that did not 
help.

Is there a way to set a browser by default, when the application has no 
configuration option for a browser, so that it will use a set default browser?

Is there a (text)-configuration file, where the browsers are set?

Thanks for the help!

Best regards

Hans