How to reset my thunderbird preferences

Written by jason artman
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The Mozilla Thunderbird e-mail client has a variety of preferences that you can configure to change the behaviour of the program. These settings include your training settings for the junk mail filter, the Web page that the program displays when loading and the font settings for HTML e-mails. Although Thunderbird has no one-click option for restoring all these settings to their defaults, you can access each setting individually through Thunderbird's Options menu.

Skill level:
Moderately Easy


  1. 1

    Click the "Tools" menu at the top of the Thunderbird window, and then click "Options."

  2. 2

    Press the "General" tab, and then click the "Restore Default" button under Thunderbird Start Page to return to the default home page that Thunderbird displays when starting up.

  3. 3

    Click the "Composition" tab, and then click the "Restore Defaults" button under "HTML" to return to the default font, text size and colour used when composing HTML messages.

  4. 4

    Select the "Security" tab, and then choose the "Junk" tab below. Click the "Reset Training Data" button to delete the settings that you have created in the junk mail filter when marking messages as spam.

  5. 5

    Click the "Advanced" tab, and then choose the "General" tab below. Select the "Config Editor" button, and then click "I'll be careful, I promise." This displays the configuration file for Thunderbird. All entries marked in bold are entries that you have changed after installing Thunderbird. Right-click a bold entry, and then click "Reset" to revert the value to its default setting.

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