Examine source code of Stay Anime

{
  "manifest_version": 2,
  "name": "Anime Plugin",
  "description": "A plugin to show what animes airing on that week",
  "version": "3.5.1",
  "browser_action": {
    "default_icon": "logo-small.png"
  },
  "icons": {
    "16": "logo-small.png",
    "48": "logo-med.png",
    "128": "logo-large.png"
  },
  "content_security_policy": "script-src 'self' 'sha256-cZHX1cnBQNpRaiym55psn+VyzFjkj/zln8ylSKIY+dM='; object-src 'self'",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  }
}