When you set Firefox as your default browser on Windows, you can also configure it to handle mail links using your preferred email website. This guide explains how to set Firefox as the default handler for mail links and [[Change the program used to open email links|configure a mail site]] to open automatically when you click mail-to links. =Set Firefox as the default handler for mail links= Starting in [[Find what version of Firefox you are using|Firefox version]] 129, you can set Firefox as the default application that handles mail links: #Open the Windows ''Start'' menu [[Image:Windows10StartButton]] and select '''Settings'''. #;[[Image:System settings|width=350]] #From your systems settings menu, click [[Image:Apps setting option|width=150]]. #Select {menu Default apps}. #;[[Image:Default apps|width=400]] #Scroll down to the ''Set defaults for applications'' section and click the '''Firefox''' app. #Open the '''MAILTO''' section to see the available apps. #;[[Image:Mail to apps|width=350]] #From the app list, select '''Firefox''' as your default app and click the [[Image:Set to default button|width=150]] button. #;[[Image:Firefox app|width=350]] You can also go to Settings -> Apps -> Default Apps and enter MAILTO in the search box to find the application already set as the default, for example, Thunderbird. When you click on the entry that comes up, you can set a new default. [[Image:DefaultAppsMailtoWin11]] =Related articles= *[[Change the program used to open email links]] *[[Make Firefox your default browser]]

When you set Firefox as your default browser on Windows, you can also configure it to handle mail links using your preferred email website. This guide explains how to set Firefox as the default handler for mail links and configure a mail site to open automatically when you click mail-to links.

Set Firefox as the default handler for mail links

Starting in Firefox version 129, you can set Firefox as the default application that handles mail links:

1. Open the Windows Start menu and select Settings.

   

2. From your systems settings menu, click .
3. Select Default apps.

   

4. Scroll down to the Set defaults for applications section and click the Firefox app.
5. Open the MAILTO section to see the available apps.

   

6. From the app list, select Firefox as your default app and click the button.

   

You can also go to Settings -> Apps -> Default Apps and enter MAILTO in the search box to find the application already set as the default, for example, Thunderbird. When you click on the entry that comes up, you can set a new default.

Related articles

• Change the program used to open email links
• Make Firefox your default browser