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can i install the firefox add-on on not connected to internet pc

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Hello I want to install Firefox on a pc that is not connected to the Internet. Is it possible? For example, can i download the Firefox extension with another pc and install it on the mentioned pc. thanks

Hello I want to install Firefox on a pc that is not connected to the Internet. Is it possible? For example, can i download the Firefox extension with another pc and install it on the mentioned pc. thanks

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You can right-click the blue add to Firefox button on the Add-ons website and download (save) the extension (XPI) file. You can use a USB drive to transfer the file to the other device. You can drag the file to a Firefox window or use the cogwheel button on the about:addons page to install a locally saved extension.

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I found it easier to do it the way cor-el describes by using a different browser. When you visit https://addons.mozilla.org/en-US/firefox/ and navigate to an add-on you will see a Download File link underneath the blue button (see image).