Examine source code of Strawberry!

{
  "name": "Strawberry!",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Illustration4.png"
    },
    "colors": {
      "frame": "rgba(255, 232, 246, 1)",
      "tab_background_text": "rgba(255, 214, 223, 0.59)",
      "toolbar": "rgba(255, 255, 255, 0.76)",
      "bookmark_text": "rgba(255, 217, 223, 0.5)",
      "toolbar_field": "rgba(255, 255, 255, 0.68)",
      "toolbar_field_text": "rgba(255, 227, 232, 0.68)",
      "tab_line": "rgba(255, 199, 199, 0.52)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f759c915-28af-4ac6-834b-2a83b063e7d9}"
    }
  }
}