Epichrome is an application (Epichrome.app) and Chrome extension (Epichrome Helper) to create and use Chrome-based SSBs on Mac OSX. Epichrome is made up of two parts: an AppleScript-based Mac application (Epichrome.app) and a companion Chrome extension (Epichrome Helper). Epichrome.app creates Chrome-based site-specific browsers (SSBs) for Mac OSX (Chrome must be installed in order to run them, but they are full Mac apps, each with its own separate Chrome profile). Each app automatically installs Epichrome Helper, which uses rules to decide which links the app should handle itself, and which should be sent to the default web browser.