Ugh, not again. I tested the steps from my earlier post (How to set the default Mailto to outlook.live.com - and have it actually WORK and I get the same problem you do.

Even a normal email address link doesn't seem to work with that handler URL any more: someguy@example.com

Since I don't know how to trick the site, one workaround is to use a bookmarklet to compose the URL from the information in the page. For example, this one will launch a compose window with the subject line set to the "title" of the page and the body set to the URL of the page (breaks if there are + signs in the URL, but I don't think that is too common):

javascript:void(window.open('https://outlook.live.com/owa/?path=/mail/action/compose&to=&body='+encodeURIComponent(location.href)+'&subject='+encodeURIComponent(document.title), '_blank'));

To install that to your Bookmarks Toolbar or Bookmarks Menu, you can use the steps on this page:

https://www.jeffersonscher.com/res/sumomarklets.html#LiveOWA

Since you are bypassing Firefox's feature and taking command of what is sent to Outlook, you could add more to the message. For example, you could edit the bookmarklet script to pre-fill some text in the body or cc yourself.

If you try this, let me know what you think.

Thanks for the fast response!

Love it! Works like a charm!

And easy access from the bookmark tool bar.

Thanks very much!

David

Personally getting frustrated by having to find workarounds to use Outlook with Firefox! Why isn't the ability to set the mailto application even a choice in their options/applications anymore...I see gmail or yahoo. Your bookmark works and thanks, but Firefox needs to fix.

Hi threelakeys, Firefox uses an old mechanism for sending content to mail programs and mail sites that no longer seems to work properly with Outlook.com. A developer (any volunteers) could step up and edit the code so it works with the new site, but it would be simpler and faster for that motivated person (or Microsoft!!) to distribute it as an add-on.

I certainly appreciate your work to solve a problem that I seem to have struggled with the last year-thanks!!!

jscher2000, thank you for the bookmarklet. I had also had problems a while ago, but found another solution that one time. ( I highlighted and cut all the text in the send field and pasted it in the body, then cut and pasted parts where they belonged.)

There are few times when I need to use MailTo but have installed the bookmarklet and will use it the next time.

Completely agree, a developer is needed to setup Outlook.com as a MailTo option in Firefox Application settings.