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Update: Firefox Quantum / Firefox 57 has completely upset the functionality and visual layout of the Firefox Web Browser. If Firefox Quantum is unacceptable to you, and you wish to maintain the latest level of browser security you have the option of switching to their [https://support.mozilla.org/en-US/kb/switch-to-firefox-extended-support-release-esr Firefox Extended Support Release (ESR)] for personal use. This give you the look, feel, and functionality of their previous releases and you will still continue to receive security updates.