I am inspecting source code of Firefox web extensions by looking into *.xpi files located in Mozzila directory.
In my local computer, which runs Fedora 25 - Firefox 52, it is
~/.mozilla/firefox/415m46wm.default/extensions
The current issue I am encountering is that when I extract *.xpi file, none of them has the manifest.json
file. As a result, using web-ext
to test add-on locally is not possible. Find out more about web-ext here