Examine source code of Tema SENA

{
  "manifest_version": 2,
  "name": "Tema SENA",
  "version": "1.0",
  "description": "Tema institucional inspirado en la identidad visual del SENA",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png",
    "256": "icons/icon-256.png"
  },
  "theme": {
    "images": {
      "additional_backgrounds": [
        "image-background.png"
      ]
    },
    "colors": {
      "frame": "#39A900",
      "tab_background_text": "#FFFFFF",
      "tab_text": "#C7F3C7",
      "tab_selected": "#2E8000",
      "tab_line": "#5CCD1D",
      "tab_background_separator": "#5CCD1D",
      "toolbar": "#39A900",
      "toolbar_text": "#FFFFFF",
      "toolbar_field_border": "#5CCD1D",
      "bookmark_text": "#FFFFFF",
      "icons": "#FFFFFF",
      "icons_attention": "#5CCD1D",
      "popup": "#F5F5F5",
      "popup_text": "#000000"
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cefd7bf5-e235-44c9-9493-19630ec0084b}"
    }
  }
}