Examine source code of Interferenz

{
  "name": "Interferenz",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "liquid-rainbow.png"
    },
    "colors": {
      "frame": "rgba(55, 138, 108, 0.47)",
      "tab_background_text": "rgba(255, 255, 255, 0.78)",
      "toolbar": "rgba(41, 41, 41, 0.26)",
      "bookmark_text": "rgba(240, 240, 240, 1)",
      "toolbar_field": "rgba(14, 84, 55, 0.33)",
      "toolbar_field_text": "rgba(240, 240, 240, 1)",
      "tab_line": "rgba(145, 214, 191, 0.28)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{307a1b29-5e20-422e-b4fc-93b64817206d}"
    }
  }
}