Default Applications

Karl karlok at
Mon Oct 1 15:29:47 UTC 2007

Michael wrote:
> When I click on a url in Thunderbird, a instance of Konqueror is
> launched.  I would like to switch this to Firefox.  Ideally, if Firefox
> is already loaded, I would like the url to open in a new tab of the
> already running instance of Firefox.  I  tried to launch the default
> applications applet, but the only thing that comes up is a big gray
> box.  Is there a way to change default applications from the command line? 
> Mike
Set the default X server web browser (not just the default KDE browser) 
with this command:

sudo update-alternatives --config x-www-browser

This will give you a numbered list of installed browsers in your system.
Choose the number of the browser you want to use as the default.

To get Firefox to pass mailto: links to Thunderbird, you can do the 

enter about:config to the addressbar
set (or create) these key-value pairs:
network.protocol-handler.external.mailto (bool) = true (string) = mozilla-thunderbird


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