If you meant instead of 10.10.5, let me know and I’ll give you the latest compatible Firefox link.
| Setting | Action | |---------|--------| | Update checks | Turn off (otherwise it will nag about unsupported newer versions) | | Telemetry | Uncheck “Allow Firefox to send technical data” | | Hardware acceleration | May cause glitches – try disabling if UI lags | | Add-ons | Use legacy version (last working for FF 78) | firefox download for mac 10105 upd
It is important to note that . The current version of Firefox requires macOS 10.15 (Catalina) or newer. If you meant instead of 10
: When you first open it, macOS may warn you that it’s an application downloaded from the internet. Click Open to proceed. Key Considerations and Risks If you meant instead of 10.10.5