Questions[default-browser](ubuntu)

I use Ubuntu 18.04 and I have the following problem.

When I try to open links via Skype it opens Mozilla firefox also I have set google chrome as my default browser.

I tried to find something in skype settings but I found nothing related to the application default browser

I am wondering how one would go about changing the default programs that are associated with every new user that is created. For example, Firefox is the default browser for Ubuntu 11.10. In my user account I changed it so that Google Chrome is the default, and it appears in the launcher when I log in. But if I were to make another account for someone else the new user would have Firefox as the default, and it would be in the launcher. How do I get Google Chrome to be in the launcher and the default browser for every new user that is made? Thanks in advance!

Is there an option to change my default browser for all my applications?

I have run update-alternatives as well as the GNOME Preferred apps selection thing. And all point to have the Chromium browser as the default. Yet, when I run xdg-open http://askubuntu.com, Firefox is launched! Similarly, Emacs and Bazaar (bzr) also launch stuff in Firefox instead of Chromium.

Are there any additional settings which affect xdg-open functionality?

Something is definitely broken:

Update

I have purged Firefox:

• update-alternatives - uses the Chromium browser
• sensible-browser - opens the Chromium browser
• xdg-open & gnome-open - opens using google-chrome which kindly tells me "it's not default browser"

!!!!

I was wondering what's the terminal command to open the default web browser.