Examine source code of Souls Flow

{
  "name": "Souls Flow",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "FireFoxIcon2.png"
    },
    "colors": {
      "frame": "rgb(28, 27, 34)",
      "tab_background_text": "rgb(209, 209, 209)",
      "toolbar": "rgb(43, 42, 51)",
      "bookmark_text": "rgb(227, 227, 227)",
      "toolbar_field": "rgba(27, 28, 35, 1)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(151, 180, 249)"
    }
  }
}