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because they do not contain modern patches for web vulnerabilities. Mozilla Support Disable Auto-Updates: After installing, immediately go to Options/Preferences > General > Firefox Updates and set it to "Check for updates but let you choose to install them" "Never check for updates" to prevent it from jumping to a modern version. Separate Profiles: dedicated profile

As he was about to give up, a friend suggested he try Firefox. John had used Firefox a few years ago, but hadn't kept up with the updates. His friend told him that the latest versions were much faster and more secure. Download Firefox 12-51 52 Esr

Looking for older versions of Mozilla Firefox or the specialized 52 Extended Support Release? You can securely download these legacy browser versions directly from the official Mozilla Release Archive . because they do not contain modern patches for