So, the plugin was installed, but broken. Sam remembered: Firefox comes with Widevine pre-enabled, but updates or cache issues can corrupt it.
He opened Firefox’s menu → → scrolled to Privacy & Security . There it was: a section labeled Digital Rights Management (DRM) Content .
The movie started instantly. Galactic Battles 2 roared to life.
The Case of the Frozen Stream
The checkbox: “Play DRM-controlled content” was — good. But next to it, a small button: “Check for updates” and a status: “Widevine Content Decryption Module provided by Google Inc. – Version unknown, status: crashed/failed.”