is there a firefox plugin like this?

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i want to install a plugin like this:when you install it and rightclick your mouse,you can have a option to choose which indicate that where can you save a picture,and then,you can link it to your article to display (must be instant,that means if you save the picture,and you can link it to your article without loging in your account where you use to save pictures)... please tell me the name.it's better if you can give some instruments about it...