Are you sure it "started" your current version, or did you have an old window open somewhere? By default, Firefox sends a new-window message to any running Fir

Are you sure it "started" your current version, or did you have an old window open somewhere? By default, Firefox sends a new-window message to any running Firefox instead of spawning a new one. Try killing all existing Firefox windows (e.g. "killall firefox" or "pkill firefox") and run it again.