if you can get to it.
Code:
mv script:chrome://global/content/bindings/notifications.xm script:chrome://global/content/bindings/notifications.xm.old
to get it out of the way, then cross fingers and hope you can now start your laptop. then you will have it so you can look at it if you want to find out the why behind it.
it may have a different absolute path as in minus the script::chrome:/ part may need to be removed. If looking at line 43 as post above suggest and not being able to fix it or know what to do with it.
This might get you into your system, if it does a follow up on that script may still be required especially if it does not regenerate itself. It may still be a needed script.