Examine source code of OpenComments MV2

{
  "name": "OpenComments",
  "description": "__MSG_exDescription__",
  "default_locale": "en",
  "version": "1.0.1",
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "uominiv101@gmail.com"
    }
  },
  "icons": {
    "16": "logo/16.png",
    "24": "logo/24.png",
    "32": "logo/32.png",
    "48": "logo/48.png",
    "128": "logo/icon.png"
  },
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://opencomments-4e86d.web.app/*"
      ],
      "js": [
        "inject/main.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "logo/icon.png",
    "content/index.css"
  ],
  "browser_action": {
    "default_title": "OpenComments Popup",
    "default_icon": "logo/no_msgs.png"
  },
  "permissions": [
    "scripting",
    "activeTab",
    "tabs",
    "storage",
    "notifications",
    "contextMenus",
    "identity",
    "<all_urls>"
  ]
}