Examine source code of Angerfist

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Angerfist_1.JPG"
    },
    "colors": {
      "frame": "#ebf0ce",
      "tab_background_text": "#e2eb61"
    }
  },
  "version": "2.0",
  "name": "Angerfist",
  "manifest_version": 2,
  "description": "Raise your fist!"
}