Rated 1 out of 5 stars

Clicked Firefox's "Email Link" button. It DID open my mailbox @ Outlook.com, but not the compose new mail page.

This review is for a previous version of the add-on (2.3). 

Hi there John, may you please open a topic on the support page, I'm hoping to fix this so it works for you as well.

The support page is on github - https://github.com/Noitidart/MailtoWebmails/issues

Can you upload a screenshot of what happened when you clicked the link. It may be that the Outlook.com service email needs updating.