I'm running macOS 10.12.5 Sierra with Firefox 54.0 on a MacBook Air. A Firefox icon is present in the Dock. When launching Firefox from this icon (or double-clicking the icon in the Applications folder), it immediately crashes. However, if I launch it via the command line (
$ ./firefox in the app folder), it does not crash. Launching via
open -a Firefox also crashes.
I launched Firefox from the command line in safe-mode and disabled all add-ons, but it still crashes when launched from the icon in the Dock.
I'm using the new Compact Dark theme. I disabled this and tested again, but Firefox still crashes when launched from the Dock icon.
Removing the icon from the Dock and adding it back did not solve this.
Downloading a fresh copy of Firefox 54.0 and installing over the previous version of 54.0 did not solve this.
Suggestions to fix this?
Update: This is not resolved in Firefox 54.0.1.
Update: This appears to be resolved in Firefox 55.0.2 (64-bit).