RPN Calculator

This extension adds a convenient reverse Polish notation (RPN) calculator as a browser action button. Also called postfix, RPN calculators take their operators after the operands. If you've used HP calculators, this extension is for you.

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RPN Calculator is available to install from Firefox Browser Add-ons and for download from this page. It has 33 active users The latest version is 1.2resigned1, and it was published 23 days ago.

All available versions

You can find the current and older versions of RPN Calculator here. You can download the archived versions or inspect their source codes.

As a free user, you can only download the latest version.

How to install RPN Calculator from an XPI file

1. Simply drag-and-drop the XPI into Firefox to install the add-on.

How to install RPN Calculator from a ZIP file

1. Download the RPN Calculator ZIP file
2. In Firefox browser, go to about:addons to open Add-ons Manager
3. Click on , then select Install Add-on From File
4. Select the RPN Calculator ZIP file from step 1. RPN Calculator is now installed on your browser.