this extension is published and active at the link https://addons.mozilla.org/en-US/firefox/addon/measuremate/
this extension is not any normal convertor. It has all the units required for measuring length (metric and others).
The units are as follows:
-> mm (milimeter)
-> cm (centimeter)
-> m (meter)
-> km (kilometer)
-> ft. in' (feet, inches')
-> yd (yards)
-> mi (miles)
there are text boxes (inputs) for each of these and typing in one converts the value of the others according to the conversion.
The feet and inches are separate text boxes in the same line rather than only 1 text box for feet which shows the result in decimal.
You might as well just use another convertor if you get the feet in decimals.
hasn't done anything yet. Just gave the name for the extension.