Are you bored with the standard message alert sound in Mozilla Thunderbird? Want to spice things up a little with your own custom sound? Follow along – it’s easy!
First, open up Thunderbird and click Tools>Options up on the toolbar.
Now, make sure the General tab is selected, and under the When new messages arrive: heading, click the radio button for Use the following sound file. This should enable the Browse button, so you can use your own sound file…
Click Browse, then browse to the sound file on your hard drive that you want to use as your new message received alert sound. When you find it, click Open.
When you’re done you can either hit Play to test your sound or click OK and wait for a new message!