Amazon Prime Instant Video Not Working–Firefox
For Firefox Ubuntu 10.04 to 12.04, make that the Hardware Abstraction Layer module is first installed using apt-get. Open a terminal and:
sudo apt-get install hal
After the “libhal” (HAL) library install completes, close the browser. Then clear the Adobe Access directories by executing the following shell commands:
mv NativeCache nc.bak
mv AssetCache ac.bak
Then reopen your Firefox browser and Amazon Prime Instant videos should play. Note: I haven’t tested this in 12.10 or later, and haven-t tried it in chrome.