How can I fix WebStorm warning “Unresolved function or method” for “require” (Firefox Add-on SDK)

Question

I\'m using WebStorm 7 for Firefox Add-on SDK development.

WebStorm shows a warning: \"Unresolved function or method\" for require().

I want to g

Answer 1

After spending an hour trying to get this to work using all solutions found online, this finally did the trick!

File -> Invalidate Caches/Restart...