The Mozilla Foundation has released Firefox 18.104.22.168, introducing support for Mac OS X 10.5 'Leopard' in the release.
The company recommends all users install the update, which also implements security and stability improvements across all its supported operating systems - Mac, Linux and Windows.
Firefox 2.x users will receive an automated update notification. The update can also be applied manually by selecting 'Check for Updates' from the Help menu.
The organisation notes some issues remain when running Firefox on Mac OS X 10.5, principally affecting media players such as Flash and Java.