Examine source code of Forecast Plus 31edee

{
  "manifest_version" : 2 ,
  "name" : "Forecast Plus 31edee",
  "version" : "8.1.17",
  "description" : "Live local weather forecast right in your browser toolbar.",
  "browser_specific_settings": {
    "gecko": {
      "id": "quick-track-nest@tabtools.co",
      "strict_min_version": "101.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions" : [
    "tabs" ,
    "sessions" ,
    "storage" ,
    "unlimitedStorage" ,
    "notifications" ,
    "alarms" ,
    "<all_urls>" 
  ],
  "browser_action" : {
    "default_icon" : {
      "16" : "icons/icon-16.png",
      "48" : "icons/icon-48.png",
      "64" : "icons/icon-64.png",
      "128" : "icons/icon-128.png"
    },
    "default_title" : "Forecast Plus 31edee",
    "default_popup" : "popup/popup.html"
  },
  "background" : {
    "scripts" : [
      "background/background.js" 
    ]
  },
  "icons" : {
    "16" : "icons/icon-16.png",
    "48" : "icons/icon-48.png",
    "64" : "icons/icon-64.png",
    "128" : "icons/icon-128.png"
  },
  "commands" : {
    "restore-last-tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+T"
      },
      "description" : "Restore last closed tab"
    },
    "save-all-tabs": {
      "suggested_key": {
        "default": "Ctrl+Shift+S"
      },
      "description" : "Save all open tabs"
    },
    "open-popup": {
      "suggested_key": {
        "default": "Ctrl+Shift+M"
      },
      "description" : "Open TabMaster Pro"
    }
  }
}