window.devToolsExtension is being deprecated in favour of window.__REDUX_DEVTOOLS_EXTENSION__ and window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__. See the README on how to use them and the post about why we added the second function.

Also there's redux-devtools-extension npm package to make things easier.

Now we don’t have the order’s and noop functions’ confusion, also the shared window namespace isn’t too vague anymore. The deprecation warnings will come in the next versions and there will be also more sugar for the npm package.