Examine source code of ClevelandBrowns

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "ClevelandBrowns",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(41, 29, 13, 0.4)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(41, 29, 13)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(23, 17, 7)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 51, 0)",
      "popup": "rgb(23, 17, 7)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(255, 51, 0, 0.6)",
      "button_background_hover": "rgba(255, 51, 0, 0.8)",
      "icons": "rgb(255, 255, 255)",
      "popup_border": "rgb(255, 51, 0)",
      "popup_highlight": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(255, 51, 0)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgb(255, 255, 255)",
      "sidebar_text": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 51, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{089d41c7-a2de-465e-8b8c-b2e667ef9b20}"
    }
  }
}