Examine source code of Aging time

{
  "name": "Aging time",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "abstrakt143.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(245, 245, 245, 1)",
      "toolbar": "rgba(107, 106, 78, 0.7)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(189, 204, 222, 0.56)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 0.62)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3970ad3b-ba73-475a-874f-f361121c4e5c}"
    }
  }
}