apt-key expired for deb.sury.org

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Today I had the case that the following message suddenly appeared during an update: The following signatures were invalid: EXPKEYSIG B188E2B695BD4743 DEB.SURY.ORG Automatic Signing Key this was the solution, 1) delete old key: 2) import new key: 3) update package list: The error should be fixed. Thanks to https://www.myprohost.com/en/blog/apt-key-expired-debsuryorg

How to Install the latest Mozilla Firefox version in Debian

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These are the only two command that lets you install the latest Mozilla Firefox  Quantum on your Linux Debian first download the latest Firefox version available wget -O FirefoxSetup.tar.bz2 “https://download.mozilla.org/?product=firefox-latest&os=linux64&lang=en-US” than create the directory mkdir /opt/firefox untar the latest Firefox version in the new directory tar xjf FirefoxSetup.tar.bz2 -C /opt/firefox/ …