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prevent display of migration assistant
}
</source>
=== Disable Migration Assistant and Welcome page ===
To prevent the Migration Assistant and the welcome page from showing after upgrades add the following lines to your thunderbird.cfg.
<source lang=javascript>
lockPref("mail.ui.show.migration.on.upgrade", false);
lockPref("app.update.showInstalledUI", false);
lockPref("browser.startup.homepage_override.mstone", "ignore");
</source>
[[category:Silent Installers]]