Examine source code of Elemental Tribe

{
  "theme": {
    "images": {
      "theme_frame": "MozillaThemeHeader.JPG"
    },
    "colors": {
      "frame": "#1b0147",
      "tab_background_text": "#000736"
    }
  },
  "version": "2.0",
  "name": "Elemental Tribe",
  "manifest_version": 2,
  "description": "testing"
}