Plugins
The plugin system exists on both versions and is enabled the same way. The screens are what differ: 1.5 has no single plugin list, using a three-page activate/install/installed workflow where a plugin’s state decides which page it appears on. The bundled plugin set differs too.
Which version am I on?
Check FOG Configuration → FOG Settings → General → FOG_VERSION in the web UI, or the version string printed at the top of
installfog.sh.