To enable JavaScript on the Firefox browser follow these steps:

1. Select the Tools option on the main menu of your browser and select Options... from the list.
   
2. Select the Content icon from the menu of icons and make sure Enable JavaScript is selected. Then, click on the Advanced button.
   
3. In the Advanced JavaScript Settings window, make sure the selections are the same as the following image, then click OK to save these changes and close this window:
   
4. Finally, in the Options window, click OK to save these changes and close this window.
   

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