Ed Greshko:
xdg-settings get default-web-browser
Kevin Cummings:
For me it returns: "xdg-settings: unknown desktop environment"
B^) I run MATE desktops.
Likewise, on both counts. While I don't use Thunderbird, other things do open the right web browser (for my personally set preference). And for further information, just following up on something later on in the thread:
[tim@fluffy ~]$ xdg-settings get default-web-browser xdg-settings: unknown desktop environment
[tim@fluffy ~]$ xdg-settings get default-url-scheme-handler xdg-settings: unknown desktop environment
[tim@fluffy ~]$ xdg-settings get default-url-scheme-handler xdg-settings: unknown desktop environment