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Allows you to use the USPS postage price calculator at postcalc.USPS.com on IceCat without disabling LibreJS or running the website's Non-free Javascript.

This add-on assumes that you are running LibreJS and was tested on the latest version of GNU IceCat, a version of Firefox.

For more info about non-free Javascript and why it should be avoided:

https://www.gnu.org/philosophy/javascript-trap.en.html

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