The Shifter icon is displayed in the menu bar.
When a static site created with Shifter is detected, it is colored. 
- clone this repo to local or download zipfile from chrome-getshfter-detector/releases.
- open
chrome://extensions/ - turn on
developer mode - “Load unpacked extension…” and select
path/to/chrome-getshfter-detectordirectory.
Install from release(xpi)
chrome-getshfter-detector/releases
In Firefox, an icon appears in the address bar only when it is detected.