Examine source code of Tab Group Colorizer

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.4",
  "description": "__MSG_extensionDescription__",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1da2dcfd-2928-056e-b28a-bc2fd11b3ae5}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "collects_data": false
      }
    }
  },
  "icons": {
    "32": "icons/thumb.png"
  },
  "permissions": [
    "storage",
    "tabs",
    "theme",
    "downloads"
  ],
  "background": {
    "scripts": [
      "scripts/switcher.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/thumb.png",
    "default_title": "colors"
  },
  "sidebar_action": {
    "default_title": "__MSG_extensionName__",
    "default_panel": "popup.html",
    "default_icon": {
      "32": "icons/thumb.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}