This browser extension will add the option in the Firefox application settings to set the default email provider for mailto links to Outlook.com. Mailto links on websites will automatically open the Outlook.com interface and prefill the information.
DISCLAIMER: This browser extension is unofficial and is not affiliated with Microsoft.
This repository contains all of the required source code files to make changes to this extension. The "master" branch contains the source code for the latest stable release. If you want to test that version, you can view the release section to download the XPI file or visit the add-on listing on Mozilla.
If you want to make changes to this extension, you are welcome to do so. All files for the extension are located in the "firefox" folder. The source code of upcoming versions (if any) will be located in another branch.
To develop and test the extension, you need to open the "about:debugging" page in Firefox and select "Load Temporary Add-on". Then you can select any file within the "firefox" folder of this repository.
Further documentation about developing Firefox extensions can be found here.
Release notes can be found on this GitHub repository or the Firefox add-ons listing.