How to create a firefox plugin? [closed]

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开发者_如何转开发

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I have to create a Firefox plugin. I am a newbie and have no idea about it.

Please provide me information about the following:

1. Skill/programming language requirements
2. Any good and simple tutorials<
3. Sample code and steps to execute it
4. Difference between firefox plugin,add-on and extension

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You can use Mozilla Developer network for documentation and other stuffs.

MDN