Examine source code of AT helper

{
  "manifest_version": 3,
  "name": "AT helper",
  "version": "1.2.3",
  "description": "__MSG_extensionDescription__",
  "default_locale": "ru",
  "icons": {
    "32": "icons/at-32.png",
    "48": "icons/at-48.png",
    "64": "icons/at-64.png",
    "96": "icons/at-96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://author.today/*"
      ],
      "js": [
        "js/index.js"
      ],
      "css": [
        "css/main.css"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://author.today/u/*/works/edit"
      ],
      "js": [
        "js/works-edit-page.js"
      ]
    },
    {
      "matches": [
        "https://author.today/reader/*"
      ],
      "js": [
        "js/reader-page.js"
      ]
    },
    {
      "exclude_matches": [
        "https://author.today/work/*/*"
      ],
      "matches": [
        "https://author.today/work/*"
      ],
      "js": [
        "js/work-page.js"
      ]
    },
    {
      "matches": [
        "https://author.today/discussions*"
      ],
      "js": [
        "js/discussions-page.js"
      ]
    },
    {
      "matches": [
        "https://author.today/work/genre/*"
      ],
      "js": [
        "js/work-genre-page.js"
      ]
    },
    {
      "exclude_matches": [
        "https://author.today/u/*/*/*"
      ],
      "matches": [
        "https://author.today/u/*"
      ],
      "js": [
        "js/profile-page.js"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "icons/at-16.png",
      "24": "icons/at-24.png",
      "32": "icons/at-32.png"
    },
    "default_title": "AT helper",
    "default_popup": "popup/index.html"
  },
  "options_ui": {
    "page": "options/index.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "author": "Egor Mikhno",
  "homepage_url": "https://github.com/emikhno/AT-helper",
  "browser_specific_settings": {
    "gecko": {
      "id": "{fcfa6583-9d37-4262-812f-5f7fb7d9e394}"
    }
  }
}