Examine source code of Nyaa Linker

{
  "name": "Nyaa Linker",
  "version": "2.4.3",
  "description": "Adds a button to Anime and Manga database websites that opens a relevant Nyaa search",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.myanimelist.net/*",
        "*://*.anilist.co/*",
        "*://*.kitsu.app/*",
        "*://*.anime-planet.com/*",
        "*://*.animenewsnetwork.com/encyclopedia/*",
        "*://*.anidb.net/*",
        "*://*.livechart.me/*",
        "*://*.mangabaka.dev/*",
        "*://*.mangabaka.org/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "16": "assets/icon-16.png",
    "48": "assets/icon-48.png",
    "128": "assets/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "Metacor.Code@gmail.com"
    }
  }
}