Firefox Download For Mac 10105 Upd !new! Jun 2026

Running an outdated browser on an unsupported OS poses security risks. To use the latest version of Firefox:

Since this is an older build, macOS might block it due to an expired gatekeeper ticket. If you see the warning “Firefox can’t be opened because it was not downloaded from the App Store” : firefox download for mac 10105 upd

| Firefox Version | macOS 10.10.5 | Security Updates | |----------------|---------------|------------------| | Firefox 78 ESR | ✅ Yes | ❌ No (EOL) | | Firefox 79+ | ❌ No | N/A | Running an outdated browser on an unsupported OS

: Once the download finishes, double-click the Firefox 78.15.0esr.dmg file. double-click the Firefox 78.15.0esr.dmg file.