Examine source code of ScrapBee

{
  "manifest_version": 2,
  "name": "ScrapBee",
  "version": "2.6.11",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "64": "icons/bee.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'; navigation-to 'filesystem:'",
  "permissions": [
    "activeTab",
    "contextMenus",
    "downloads",
    "storage",
    "tabs",
    "unlimitedStorage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "file:///*/*",
    "http://*/*",
    "https://*/*",
    "<all_urls>",
    "menus",
    "nativeMessaging",
    "notifications"
  ],
  "applications": {
    "gecko": {
      "id": "scrapbee@scrapbee.org",
      "strict_min_version": "60.0"
    }
  },
  "sidebar_action": {
    "default_title": "ScrapBee",
    "default_panel": "html/sidebar.html",
    "default_icon": "icons/bee.png"
  },
  "background": {
    "page": "html/background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/bee.png",
      "32": "icons/bee.png"
    },
    "default_title": "ScrapBee",
    "default_popup": "popup/browser_action.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "html/options.html"
  },
  "commands": {
    "_execute_sidebar_action": {
      "suggested_key": {
        "default": "Ctrl+Alt+B",
        "linux": "Ctrl+Alt+B",
        "mac": "MacCtrl+Alt+B"
      },
      "description": "Toggle ScrapBee Sidebar"
    }
  }
}