We'll need to remove the ifdef for this [pref](https://searchfox.org/mozilla-central/source/browser/app/profile/firefox.js#2784).
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Now that we've gotten approval from khudson, we'll need to remove the ifdef for this [pref](https://searchfox.org/mozilla-central/source/browser/app/profile/firefox.js#2784) to enable use in release.