Examine source code of modell#1

{
  "name": "tema",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "tema.jpg"
    },
    "colors": {
      "frame": "rgba(5, 6, 10, 1)",
      "tab_background_text": "rgba(255, 255, 255, 0.72)",
      "toolbar": "rgba(20, 11, 11, 0.02)",
      "bookmark_text": "rgba(255, 250, 250, 1)",
      "toolbar_field": "rgba(56, 49, 49, 0.04)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(41, 173, 134, 0.66)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{97a573cd-682d-40f3-9bb2-a8ae64ad9056}"
    }
  }
}