NP, dude. As someone who learned JavaScript in the dark ages, when IE had to be a consideration for everything you did, writing a JS program now is trivial.
Yeah... Then again I just use the DuckDuckGo bang !mdn and it searches MDN directly.
There's also devdocs.io which can be indispensable when using a lot of popular utility libraries and frameworks in the same project. Just having a single page with all the relevant docs is just a real blessing.