Examine source code of Switch to old Reddit

{
  "manifest_version": 2,
  "name": "Switch to old Reddit",
  "version": "1.1",
  "description": "Adds an option on the Context Menu to switch from the new reddit website to the old reddit website. Only works when the active tab is on www.reddit.com.",
  "background": {
    "scripts": [
      "background_sw_to_old_reddit.js"
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus"
  ]
}