Examine source code of BunPro Alerts

{
  "manifest_version": 2,
  "name": "BunPro Alerts",
  "version": "1.6",
  "author": "i_Jedi",
  "description": "Shows alerts for BunPro.",
  "applications": {
    "gecko": {
      "id": "bunproalerts@ijedi.me"
    }
  },
  "permissions": [
    "webRequest",
    "https://bunpro.jp/api/*",
    "storage"
  ],
  "background": {
    "scripts": [
      "/scripts/storage.js",
      "/scripts/settings.js",
      "/scripts/bunproapi.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/bunproicon-16x16.png",
      "32": "icons/bunproicon-32x32.png"
    },
    "default_popup": "views/home.html"
  }
}