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Before downloading, ensure your Mac meets these minimum requirements for this specific version:

While newer versions of Firefox (such as version 52 and above) require macOS 10.9 or later, version 45.9.0 ESR (Extended Support Release) was specifically maintained to provide security updates for older systems until May 2017. firefox 45.9 0esr mac download

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Directory Listing: /pub/firefox/releases/45.9.0esr/mac/it/ - mozilla.org Directory Listing: /pub/firefox/releases/45.9. 0esr/mac/it/ mozilla.org firefox 45 for macos snow leopard - Mozilla Support Before downloading, ensure your Mac meets these minimum