Try this link. It work with me. The same exact problem cause by protected flash content.
This is how to install Adobe Flash Plugin for Firefox:
Go to this page and select the option .tar.gz for other Linux. Download the file.
Unpack the plugin tar.gz and copy the files to the appropriate location.
Save the plugin tar.gz locally and note the location the file was saved to.
Launch terminal and change directories to the location the file was saved to.
Unpack the tar.gz file. Once unpacked you will see the following:
Identify the location of the browser plugins directory, based on your Linux distribution and Firefox version.(Usually it is /usr/lib/mozilla/plugins/)
Copy libflashplayer.so to the appropriate browser plugins directory. At the prompt type:
Copy the Flash Player Local Settings configurations files to the /usr directory. At the prompt type:
sudo cp -r usr/* /usr
- Now restart your browser.
How do I install Adobe Flash player?
Answers by IgnitE