# Outlook.com mailto

> Add Outlook.com as a default email provider for all mailto links.

Canonical page: [https://chrome-stats.com/d/outlook-com-mailto](https://chrome-stats.com/d/outlook-com-mailto)

## Overview

- **ID:** `outlook-com-mailto`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Wesley Branton
- **Category:** social-communication
- **Daily users:** 1,560
- **Weekly downloads:** 25
- **Rating:** 4.64 / 5 (22 ratings)
- **Version:** 2.7.1
- **Last updated:** 2023-06-22
- **First published:** 2019-05-26
- **Size:** 49 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/outlook-com-mailto/)
- **Website:** [https://github.com/WesleyBranton/Outlook.com-mailto/issues](https://github.com/WesleyBranton/Outlook.com-mailto/issues)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/outlook-com-mailto/privacy/](https://addons.mozilla.org/firefox/addon/outlook-com-mailto/privacy/)

## Description

The Outlook.com mailto Chrome extension allows users to configure their browser to open all mailto links directly with Outlook.com. Once installed, mailto links on any website will automatically open the Outlook.com interface and prefill the relevant email fields, providing a seamless email experience. This extension is unofficial and is not affiliated with Microsoft. It offers a straightforward solution for users preferring Outlook.com as their default email handler without changing system-wide settings.

Designed to enhance productivity and streamline email management, this extension modifies browser settings to redirect mailto links to Outlook.com with just a click. For more details about the permissions it requires, users can consult the provided documentation link.

## Rankings

- #2,534 — Overall
- #297 — Social & Communication
- #16 — disclaimer
- #25 — hotmail
- #52 — mail
- #57 — provide

## Permissions and access

### Permissions

- `storage`
- `menus`
- `tabs`
- `webRequest`
- `webRequestBlocking`
- `*://outlook.com/send/*`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Review summary

Users appreciate this Firefox add-on for effectively setting Outlook.com as the default mailto handler, especially after Firefox removed original mailto support. It generally works on first try and addresses a long-felt need. However, several users notice it opens a new tab rather than an existing mailbox tab and sometimes requires repeated sign-ins. Some experienced an initial issue with the composer window not opening correctly, which resolved after browser restart. A Firefox warning about it not being a recommended extension also raised some concerns among users.

### Pros

- Effectively sets Outlook Web as the default mailto handler in Firefox.
- Easy to use and works as described, mostly on first try.
- Highly appreciated by users who lost original mailto functionality in Firefox.
- Developer responsive to user feedback and issues.
- Provides a solution for opening mailto links directly in Outlook.com.

### Cons

- Sometimes opens a new tab instead of using an already open Outlook mailbox tab.
- May require users to sign back in each time a mailto link is clicked, especially if using outlook.office.com.
- In some cases, initially opens Outlook.com homepage instead of mail composer (resolved after restarting browser).
- Not recommended extension warning shown by Firefox causing user concern.

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Source: [Chrome-Stats](https://chrome-stats.com/d/outlook-com-mailto)