Examine source code of Yesterdays Memories

{
  "name": "Yesterdays Memories",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "2A.jpg"
    },
    "colors": {
      "frame": "rgba(168, 151, 114, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(168, 151, 113, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(168, 151, 113, 0.05)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a83cdc53-f4c8-4b9a-9e13-430eed64fb5c}"
    }
  }
}