How do you disable a plugin? | Mozilla Firefox

In Firefox:

• Open the menu.
• Select Add-ons.
• Click the Add-Ins tab.
• Click the drop-down box that you want to disable the plugin to the next circuit.
• Options from “never” Enable “select.

Note: If you leave off a plug-in, which means you can not do certain things. If you disable the flash circuit, for example, in some video streaming website you can see any video.