Examine source code of Seerosenblatt

{
  "name": "DSC_0027",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "DSC_0027.JPG"
    },
    "colors": {
      "frame": "rgba(6, 150, 20, 1)",
      "tab_background_text": "rgba(19, 143, 137, 1)",
      "bookmark_text": "rgba(26, 92, 143, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.7)",
      "toolbar_field_text": "rgba(27, 90, 135, 0.7)",
      "tab_line": "rgba(19, 145, 143, 0.7)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e3045dc-d059-4ce5-bf46-bb53f5d53c2e}"
    }
  }
}