Examine source code of Weimo

{
  "manifest_version": 2,
  "name": "weimo",
  "version": "1.0",
  "description": "Open weibo pages in the mobile version to view content without logging in",
  "icons": {
    "48": "icons/icon192.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "menus"
  ]
}