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Icannot use my mouse to select an option when purchasing

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Whilst trying to purchase an item on a website, I have been unable to select an option on the item I wish to purchase. The mouse will select the original existing option on the item and will not allow me to select any other option. I cannot select an option from This Happened question

Whilst trying to purchase an item on a website, I have been unable to select an option on the item I wish to purchase. The mouse will select the original existing option on the item and will not allow me to select any other option. I cannot select an option from This Happened question

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Try the Firefox SafeMode to see how it works there.
A troubleshooting mode, which disables most Add-ons.
(If you're not using it, switch to the Default Theme.)

  • You can open the Firefox 4.0+ SafeMode by holding the Shft key when you use the Firefox desktop or Start menu shortcut.
  • Or use the Help menu item, click on Restart with Add-ons Disabled... while Firefox is running.

Don't select anything right now, just use "Continue in SafeMode."

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shft key) to open it again.

If it is good in the Firefox SafeMode, your problem is probably caused by an extension, and you need to figure out which one.
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes

When you figure out what is causing that, please let us know. It might help other user's who have that problem.