Error when trying to restore a session

[flccrakers]

I try to use your tool, but cannot restore a session.
I got this error: 

gnome-terminal-server.Gnome-terminal is running:  true 1 0
Navigator.Firefox is running:  false 1 0
events.js:160
      throw er; // Unhandled 'error' event
      ^

Error: spawn "/usr/share/applications/firefox.desktop" ENOENT
    at exports._errnoException (util.js:1020:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:197:32)
    at onErrorNT (internal/child_process.js:376:16)
    at _combinedTickCallback (internal/process/next_tick.js:80:11)
    at process._tickCallback (internal/process/next_tick.js:104:9)

Any idea how to fix it?
I'm using node v6.11.3

[johannesjo]

Hi there! Thanks for reporting! Is there a file at /usr/share/applications/firefox.desktop present? If not adding "Navigator.Firefox": "firefox" to "WM_CLASS_AND_EXECUTABLE_FILE_MAP" inside ~/.lwsm/config.json might help.