Version 66.0.5, first offered to Release channel users on May 7, 2019
Further improvements to re-enable web extensions which had been disabled for users with a master password set (Bug 1549249) More support information
https://www.mozilla.org/en-US/firefox/66.0.5/releasenotes/
66.0.5 thru internal updater
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https://www.mozilla.org/en-US/firefox/all/