firefox: how do you uninstall an add-on?

have installed Web Developer on Firefo开发者_StackOverflowx 5.0 and personally found it redundant. would like to remove it. Tools -> Add-Ons only adds add-ons, but does not remove. is there any way to get rid of it?

btw, this is seems like such a dumb question, but heaven help me I cannot find how to do this simple task.

from menu, have Tools > Add-Ons, but that is a web page that only has ability to add add-ons, not remove them.

running on Ubuntu, so menu structure might be different than MS

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problem was that I was following Add-On's, which is a web page for finding and installing Add-Ons. the option Extensions shows installed Add-Ons and allows their removal. - my stupid (thankfully)

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To remove an addon / extenstion - goto Firefox > options > add-ons - then from the left menu select "Extensions" select the extension to remove and click "Remove" ... i just tested with Firebug and it does the job ....