Examine source code of PTW Extender

{
  "manifest_version": 2,
  "author": "Amndeep Singh Mann",
  "name": "PTW Extender",
  "version": "2.2.3resigned1",
  "description": "Adds titles to your MyAnimeList, AniList, or Kitsu plan-to-watch/read list with the url of where you found the title added as a comment.",
  "applications": {
    "gecko": {
      "id": "{c4d3fb11-c300-4eed-a904-144fba03fb61}"
    }
  },
  "icons": {
    "16": "icons/icon_16.png",
    "32": "icons/icon_32.png",
    "48": "icons/icon_48.png",
    "64": "icons/icon_64.png",
    "96": "icons/icon_96.png",
    "128": "icons/icon_128.png"
  },
  "permissions": [
    "https://myanimelist.net/*",
    "contextMenus",
    "identity",
    "notifications",
    "storage",
    "tabs",
    "webNavigation"
  ],
  "background": {
    "scripts": [
      "lib/browser-polyfill.js",
      "lib/umd.js",
      "options/options-defaults.js",
      "generic/generic.js",
      "mal/mal.js",
      "anilist/query.js",
      "anilist/anilist.js",
      "kitsu/kitsu.js",
      "menu.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "*://anilist.co/*"
      ],
      "js": [
        "lib/browser-polyfill.js",
        "lib/linkify.js",
        "lib/linkify-element.js",
        "anilist/prettified.js",
        "generic/prettified.js"
      ]
    },
    {
      "matches": [
        "*://kitsu.io/*"
      ],
      "js": [
        "lib/browser-polyfill.js",
        "lib/linkify.js",
        "lib/linkify-element.js",
        "kitsu/prettified.js",
        "generic/prettified.js"
      ]
    },
    {
      "matches": [
        "*://myanimelist.net/ownlist/*"
      ],
      "js": [
        "lib/browser-polyfill.js",
        "lib/linkify.js",
        "lib/linkify-element.js",
        "mal/prettified.js",
        "generic/prettified.js"
      ],
      "all_frames": true
    }
  ]
}