How to Enable or Disable Javascript in Mozilla Firefox?br br Step 1: Open Firefox web browser.br br Step 2: Type "about:config" without quotes in address bar and hit Enter button on the keyboard.br br Step 3: You get the warning window, Click on "I accept the risk" button.br br Step 4: In Search box, type "javascript.enabled", you get that preference.br br Step 5: Hight it, right click on it.br br Step 6: Click on "Toggle" option to enable or disable.br br That's it.