Probably stupid question on Thunderbird & Kubuntu

[Iridium]

Hi everyone!

Every time I click on a weblink on a Thunderbird iit asks me to choose an application - I'd like to use Chrome-beta which I've installed.

Here's some screenshots of what happens when I click a link.






I'm sure this is a very stupid question, I'm brand new to Linux.

Thank you, anyone, who can help!

[Iridium]

Yep, that was a little too newbie and embarrassing and I solved it in the end

Now, do you think that you could have a look at my new question, (don't worry, it's not as stupid)?

Thanks for your help.