WebExtension (originally created for Mozilla Firefox, not tested on other browsers) that replaces (American) units to their SI/Europian counterparts.
Currently only the english convention is converted (comma as separator between thousands and points to represent floating point numbers).
Thus far implemented:
-
lbs/pounds to kg
-
fahrenheit to celsius
Based on example that can be found here: https://github.com/mdn/webextensions-examples/tree/master/emoji-substitution