My work-provided Windows computer died last week, and so I have been using my Dell Inspiron 1525 with LXDE/Lubuntu 18.04 with the lightweight Falkon web browser which I launch from the Application Launch Bar at the bottom of the screen. However sometimes the chromium web browser was being opened, for example when I click a link in emacs. Here is how I set Falkon to be used instead.
I found a related article on stackoverflow with a response from Lawful Lazy that helped me find a solution that uses xdg-settings.
First I created the file
with the following contents:
[Desktop Entry] Type=Application Name=falkon Comment=Falkon minimal web browser Terminal=false Exec=falkon Categories=Network;WebBrowser
Then I ran the command line
xdg-settings set default-web-browser falkon.desktop
Test it works via