@Carol1ne,
Locate the top menu bar. Click Tools
Select Options . A new dialog box will open on your screen.
Click the Content icon.
Enable JavaScript in Firefox
•Step 1
View the list of checkboxes. Make sure the 'Enable JavaScript' box is checked.
•Step 2
Click the 'Advanced' button. A drop-down menu will appear.
•Step 3
Use this menu to configure JavaScript according to your preferences. Select the checkboxes for the actions you want to allow scripts to perform. Click 'OK' once you are done.
•Step 4
Close the Options box by clicking on 'OK'. JavaScript will now be enabled.