PUBLIC MARKS from decembre with tags FIR57 & customize

How to enable Firefox WebExtensions on Mozilla websites (in https://www.ghacks.net/2017/10/27/how-to-enable-firefox-webextensions-on-mozilla-websites/): - Load about:config in the Firefox web browser. - You can run a search for just to make sure it does not exist: privacy.resistFingerprinting.block_mozAddonManager. It does not in the most recent Firefox Nightly builds at the time of writing. - Right-click in the part of the window that lists the preferences, and select New > Boolean from the context menu. - Name the new Boolean value: privacy.resistFingerprinting.block_mozAddonManager. - Set its value to true.