React DevTools pre-release build - updated 08/14/2018 at 6:29pm PDT

GitHub issue facebook/react-devtools/issues/1079

If you already have the React DevTools extension installed, you may need to temporarily remove it in order to install this prerelease build.

Chrome

1. download extension
2. Double-click to extract
3. Visit chrome://extensions
4. Click "LOAD UNPACKED"
5. Select extension

Firefox

1. download extension
2. Visit about:debugging
3. Click "Load Temporary Add-on"
4. Select extension