In Firefox 55.0.3 a new empty tab is opened with an URL starting with "mailto:?to=&subject=" followed by the title of the web page I am sending. Email client is MS Outlook 2010.

This should be a great replacement for the old Email This! extension that is no longer supported. Suggestions for improvement:
- adding selected text from the web page in the email body after the URL
- ability to configure different email accounts and choose which one to use from a menu

Great work! Thank you!