This blog entry refers to Debian 10.3 and Xfce 4.12 on a desktop machine.
On a whim, I decided to reset my default browser from Chromium (Version 80.0.3987.132) to Firefox (version 68.6.0esr). Shortly thereafter, I decided to go back to Chromium and reset the default at Xfce menu item
Code:
Applications/Settings/Settings Manager/Preferred Applications/Web Browser
Then I clicked on a link in a daily email in Thunderbird for my local newspaper. The link opened...
