This is for Firefox browser help no for Addon issues. If you got that violation you should contact back to the message you received not on Firefox forum.

''<p>dennis.vollmer [[#question-1479811|said]]</p>'' <blockquote>I would like to know how a password manager is in violation of Mozilla Browser ,, was this an error?,, I do not understand. Can some one inform me of the issue. </blockquote> I take it you mean the McAfee extension TrueKey as a recent change or update to their extension may have triggered a extension policy violation for it to be blocked. https://extensionworkshop.com/documentation/publish/add-on-policies/ Not the first time McAfee had their extensions added to blocklist as per this older list https://blocked.cdn.mozilla.net/