[sciurus]

In case it still helps you or someone else: A fix for Firefox 52 through 56 is available now at https://addons.mozilla.org/en-US/firefox/addon/disabled-add-...

(Disclosure: I work for Mozilla)

[brokenmachine]

Great. Thank you.

Would you mind please telling whoever you need to that we need automatic session saving/restoring to work properly, and then lots of people like me will happily update.