Setting Mailto for Your Google Apps Domain Within Firefox

gmailfirefoxIf you have you ever tried setting up the mailto function within Firefox for Google apps, then you know what a pain it could be. This article will walk you through how to setup the mailto shortcut for your Google Apps domain within Firefox 3.6.8 on Windows 7. This means that by clicking on any “mailto” links it will automatically open and compose a new email in your Gmail account.

1. Open up FireFox 3.6.8 and paste in the following into the address bar:


2. Click “I’ll be careful, I promise” when the warning appears


3. Copy and paste the following three values into the “Filter” field, one at a time and make sure they are set to “true”. If not, double click the value to change it:

  • gecko.handlerService.allowRegisterFromDifferentHost
  • network.protocol-handler.expose.mailto
  • network.protocol-handler.external.mailto

4. Update the following script to have your domain within the URL and on the label for the new “mailto” application handler. Paste it into the address bar within FireFox, hit Enter and then click the “Add Application” button when the small notification appears:

javascript:window.navigator.registerProtocolHandler(‘mailto’,’’,’Google Apps – Your Domain‘)


5. Next get into the Applications settings section within the options menu item by going to Tools -> Options:


6. Navigate to the Applications tab, scroll down to the “mailto” entry, select you’re the “Google Apps – Your Domain” entry you created and then click “OK”.

  • Firefox should take note of this tweak and make it a setting within their control panel!

  • Thanks for the post. It works on Mac OSX also.

  • matthew laver

    I too would like it to open in a new tab – if you have any suggestions.

  • ben

    Any hints on how to make the compose email open in a new tab?

  • patrick le floch

    All righty, last post….

    It works as described, if only one reads the instructions CAREFULLY. I was pasting the java into the “filter” field, not the “address”.

    Sorry for the RTFM messages.


  • Thanks Garrett

    Found your post after a bit of googling around! Tried Gmail notifier solution but doesn’t work with Google Apps, will let everyone know about this one.