Examine source code of Unobtrusive

{
  "manifest_version": 2,
  "version": "1.0.1",
  "name": "Unobtrusive",
  "theme": {
    "colors": {
      "toolbar": "rgb(102, 102, 102)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(85, 85, 85)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(119, 119, 119)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "ntp_background": "rgb(51, 51, 51)",
      "tab_loading": "rgb(119, 119, 119)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{eec589f4-0e04-42ed-a558-deeffad80e5b}"
    }
  }
}