Firefox 67 continues the “Quantum” series of the web browser with some very nice enhancements, such as the ability to finally run different versions of Firefox side by side by default. Furthermore, Firefox 67 promises to protect users against running older versions of Firefox that may cause stability issues or data corruption. To better protect the security and privacy of users, Firefox 67 will let users block known crypto-miners and fingerprinters in the web browser via the Content Blocking preferences or in Custom settings, as well as the ability to manually approve newly installed extensions in Private Windows.