Firefox Calculator is a new extension to add to your browser Mozilla Firefox which includes in that browser a complete scientific calculator that will allow you to perform any type of operation both arithmetic or trigonometric as well as unit and measurement conversions, and all without the need for exit the browser itself.
Firefox Calculator contains a detailed history of the calculations made, in case you must return to them at any given time to consult them or to redo them.
You can free download Firefox Calculator 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.