Absolutely, I'm using it to build an extension both for Chrome and Firefox [0]. Perhaps the only Firefox-specific thing is 'sign' command which signs for addon

Absolutely, I'm using it to build an extension both for Chrome and Firefox [0]. Perhaps the only Firefox-specific thing is 'sign' command which signs for addonz.mozilla.org [0] https://github.com/karlicoss/promnesia/blob/master/extension/build https://github.com/karlicoss/promnesia/blob/master/extension...