Examine source code of forester

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "forester",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(132, 159, 124)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(150, 179, 141)",
      "tab_background_text": "rgb(230, 230, 230)",
      "toolbar_field": "rgb(149, 173, 140)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(132, 159, 124)",
      "popup": "rgb(132, 159, 124)",
      "popup_text": "rgb(255, 255, 255)",
      "icons_attention": "rgb(141, 235, 113)",
      "ntp_background": "rgb(203, 219, 198)",
      "ntp_text": "rgb(88, 102, 84)",
      "toolbar_bottom_separator": "rgb(132, 159, 124)",
      "toolbar_field_border_focus": "rgb(150, 179, 141)",
      "toolbar_top_separator": "rgb(132, 159, 124)",
      "tab_loading": "rgb(132, 159, 124)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{846d1f1b-f26f-40c3-b9a4-a7fb1a81b641}"
    }
  }
}