Examine source code of Pixel snails!

{
  "name": "Pixel snails!",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "New Project.png"
    },
    "colors": {
      "frame": "rgba(72, 93, 0, 1)",
      "tab_background_text": "rgba(238, 136, 188, 1)",
      "toolbar": "rgba(255, 255, 255, 0.68)",
      "bookmark_text": "rgba(22, 64, 49, 1)",
      "toolbar_field": "rgba(255, 250, 250, 0.75)",
      "toolbar_field_text": "rgba(72, 93, 0, 1)",
      "tab_line": "rgba(238, 136, 188, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a6bf2740-ef9c-4be6-a50c-b4fc6178753f}"
    }
  }
}