Examine source code of Browser Lock

{
  "manifest_version": 2,
  "name": "Browser Lock",
  "version": "1.0.0",
  "description": "Lock your browser with a password. Secure your session before any tabs open.",
  "author": "Browser Lock",
  "browser_specific_settings": {
    "gecko": {
      "id": "browser-lock@local.dev",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "tabHide",
    "webNavigation",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Browser Lock"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "web_accessible_resources": [
    "lock/lock.html",
    "setup/setup.html"
  ]
}