Examine source code of Purple White II

{
  "name": "Purple White II",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "firefox.bkg.template.white.iii.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(97, 0, 194, 1)",
      "toolbar": "rgba(97, 0, 194, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(97, 0, 194, 1)",
      "tab_line": "rgba(255, 255, 255, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5891b3a6-966f-423f-a82e-038198f7efe7}"
    }
  }
}