Examine source code of JabRef Browser Extension

{
  "manifest_version": 3,
  "name": "JabRef Browser Extension",
  "description": "The JabRef browser extension imports new bibliographic information directly from the browser into JabRef.",
  "version": "3.2.2",
  "icons": {
    "16": "/JabRef-icon-16.png",
    "48": "/JabRef-icon-48.png",
    "96": "/JabRef-icon-96.png",
    "128": "/JabRef-icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@jabfox",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "commands": {
    "_execute_page_action": {
      "suggested_key": {
        "default": "Alt+Shift+J"
      }
    }
  },
  "developer": {
    "name": "JabRef",
    "url": "http://www.jabref.org/"
  },
  "homepage_url": "http://www.jabref.org/",
  "host_permissions": [
    "<all_urls>"
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAimiMLZZCsf+p92UUzQRWYljtoUk0a9AuN+D3TJTFcm1BEDXKIDVmWG20S4yLQyYs8kWao3eTSdYykgsZLPtay1pFKtoM4csGB6sEOO+h25Nv/AU7pN5yH5PqcTIGkuH6AsQQQTPS1Y+vDfz+548oVXzK033l6ernhKRj4dngueZyQX89U38zkorq0/PPWfE8ppPzXiWo1Pn5C5scgzaHSfavIkbBpWuiJw6moSoYw4UxzmU6FmzjM/c8Ags/QPU/8M3BeC1eigStifBDkuIIDQtMtiTXEgCqHjIacB3uB7SJKL+0wsoREqoz3cX7uNLnB+DKu+s0OZKVah8gkliBLQIDAQAB",
  "permissions": [
    "<all_urls>",
    "scripting",
    "activeTab",
    "tabs",
    "storage",
    "nativeMessaging",
    "offscreen",
    "webRequest",
    "declarativeNetRequest"
  ],
  "web_accessible_resources": [
    {
      "matches": [
        "<all_urls>"
      ],
      "resources": [
        "sandbox.js",
        "translators/*.js"
      ]
    }
  ],
  "background": {
    "type": "module",
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_icon": {
      "16": "JabRef-icon-16.png",
      "48": "JabRef-icon-48.png",
      "128": "JabRef-icon-128.png"
    },
    "default_title": "Import references into JabRef",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  },
  "content_scripts": []
}