Created attachment 377076 [details, diff] exo-open-mozilla-binary-packages.patch Mozilla Firefox and Thunderbird binary package executables (firefox-bin and thunderbird-bin) are not recognized by the helpers in exo-open. To observe this, start with a clean xfce profile (no custom helpers configured) with on a machine with www-client/firefox-bin installed, and attempt to run: > exo-open --launch WebBrowser ...notice the dialog...it's supposed to know about Firefox automatically, but it doesn't. The attached patch fixes the issue.
I can confirm this issue because I use Xfce for a long time and I was surprised when I didn't find Firefox in preferred appliactions list. I knew it was something because of firefox-bin. It looks like this patch is trivial.
Could someone submit this patch upstream, please?