Examine source code of Happy Goldfish by M♥Donna

{
  "name": "Happy Goldfish by M♥Donna",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(12, 74, 68, 1)",
      "tab_background_text": "#e8f4f4",
      "toolbar": "rgba(12, 77, 73, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(12, 77, 73, 0.09)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6bb81937-9f63-4035-9651-f304b4245d61}"
    }
  }
}