Examine source code of Gray Wet Glass

{
  "name": "Gray Wet Glass",
  "manifest_version": 2,
  "version": "2.1",
  "author": "Maxim Maksovich",
  "homepage_url": "https://vk.com/maxim.maksovich",
  "icons": {
    "48": "icon.png"
  },
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.3)",
      "toolbar_field": "rgba(255, 255, 255, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "frame": "rgba(150, 150, 150, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)"
    }
  }
}