How To Encrypt Email Messages in Firefox

Here’s a handy Firefox extensions that allow you to easily encrypt email messages, and it will work with most web-based email providers.

An additional level of security is always a good idea when you’re sending sensitive information via email. Here’s a handy Firefox extension that allow you to easily encrypt email messages, and it will work with most web-based email providers.

First, install the Encrypted Communication extension from here. The person you’re sending an encrypted message to, will need this extension installed as well.

encrypted communication

After the extension is installed, just write an email and right click somewhere in the message body, and click Encrypt Communication.

encrypt communication

You’ll be asked to verify a password, which the recipient of the email should know too.

encrypted communication password

Once you’ve done that, your email will become a bunch of gibberish. It will also have a warning saying that you need the extension to decrypt it.

encrypted email

Once the recipient gets the message, they’ll just right click and select  Decrypt Communication.

encrypted communication decrypt

Then enter the correct password you both agreed on.

encrypted communication password decrypt

Once the password has been entered twice, the recipient will see the hidden text.

text decrypted

This worked great for me, whether I used it with Gmail,, Yahoo Mail, or the web interface of a Microsoft Exchange email account. Remember too, for even more security, you can hide text in image files.



  1. Jack Busch

    February 22, 2013 at 11:59 am

    I think this is pretty cool. I was trying it out with a friend earlier. I think it probably defeated the purpose that we were emailing the passwords back and forth to each other.

    • Bogdan Bele

      February 22, 2013 at 12:50 pm

      It is pretty cool. But since it has that message saying what it’s encrypted with, including the password won’t help :)

  2. Brian Burgess

    February 22, 2013 at 12:04 pm

    Yeah, you would want to make sure each person knows the password through a different mode of communication. Over the phone, or better yet, in person.

  3. Emir

    February 26, 2013 at 11:01 pm

    Too bad it cannot be used in Microsoft Outlook or other mail clients.

    • Bogdan Bele

      February 27, 2013 at 4:51 am

      Not unless you’re using a web client, no.

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