Firefox is no longer supported on Windows 8.1 and below. Please download Firefox ESR (Extended Support Release) to use Firefox.
Internet for people, not profit — Mozilla
Firefox is no longer supported on Windows 8.1 and below. Please download Firefox ESR (Extended Support Release) to use Firefox.
Mozilla Observatory
📣︎ Heads up! New security scoring standards apply - Your website grade may have changed. MDN Observatory will launch soon. Learn More. The Mozilla Observatory has helped over 240,000 websites by teaching developers, system administrators, and security professionals how to configure their sites safely and securely.
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