nwjs version after 0.18.8 have a problem before this version all work.
vue-devtools 3.0.6_0

Reproduction Link
Simple Project nwjs + vue - https://github.com/sarik93/simple-nw-vue-example

Steps to reproduce
npm install -g nw@0.19.0-sdk
run: nw -load-extension=full_path_to_vue-devtool
In window open chrome devtools
Click in vue tab

What is Expected?
vue-devtool detected Vue instance in page

What is actually happening?
Now vue-devtool is empty, not detect instance Vue.

I tested in colleagues Mac and Linux, the result is the same.
In nw version 0.19.0 update Chromium to 55.