The Shockwave plugin allows you to play Shockwave movies in your browser. This article explains how to set up Shockwave and where to find help for Shockwave if you have further questions.
Although Shockwave is not included with Firefox by default, you can check to see if you have installed it previously. To check, complete the following steps:
Additionally, you can check to see if you have the Shockwave player plugin using Firefox:
If you have not installed the Shockwave plugin, please complete the following instructions:
Alternatively, you can download the Shockwave uninstaller from the Adobe website. Save the file to a folder of your hard disk, close all the programs and run the uninstaller; follow the instructions on the dialog boxes.
To uninstall the Shockwave player on a Macintosh OS, download the installer from this link. This program can also be used to uninstall Shockwave.
The Shockwave plugin can use up to 100 MB in a very short period of time. If you are constrained for RAM on your system, please uninstall Shockwave by following the instructions above.
One area to examine is Compatibility mode. On some systems, Shockwave fails to work properly unless it is run in Compatibility mode:
If you continue to experience problems, you can Submit an error report to Adobe.
Based on information from Shockwave (mozillaZine KB)