Examine source code of DeviantArt No.04

{
  "name": "DeviantArt No.04",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "deviantart-04.png"
    },
    "colors": {
      "frame": "rgba(57, 112, 143, 1)",
      "tab_background_text": "rgba(240, 240, 240, 1)",
      "toolbar": "rgba(0, 0, 0, 0.43)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.29)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(0, 170, 255, 0.5)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d62e5e8a-9932-4e0d-a520-a400b512a438}"
    }
  }
}