Examine source code of Sky Follower Bridge

{
  "icons": {
    "16": "icon16.plasmo.2577fc03.png",
    "32": "icon32.plasmo.d583dc1e.png",
    "48": "icon48.plasmo.e0fcfb1d.png",
    "64": "icon64.plasmo.e6259081.png",
    "128": "icon128.plasmo.96a1ede9.png"
  },
  "manifest_version": 3,
  "action": {
    "default_icon": {
      "16": "icon16.plasmo.2577fc03.png",
      "32": "icon32.plasmo.d583dc1e.png",
      "48": "icon48.plasmo.e0fcfb1d.png",
      "64": "icon64.plasmo.e6259081.png",
      "128": "icon128.plasmo.96a1ede9.png"
    },
    "default_popup": "popup.html"
  },
  "version": "3.2.0",
  "author": "kawamataryou",
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "background": {
    "scripts": [
      "static/background/index.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "permissions": [
    "storage",
    "identity"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*",
        "https://www.tiktok.com/*"
      ],
      "js": [
        "Profile.bcc30549.js"
      ],
      "all_frames": true,
      "css": []
    },
    {
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*",
        "https://www.threads.net/*",
        "https://www.threads.com/*",
        "https://www.instagram.com/*",
        "https://www.tiktok.com/*",
        "https://www.facebook.com/*"
      ],
      "js": [
        "App.9ac5cc26.js"
      ],
      "all_frames": true,
      "css": []
    }
  ],
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnZzW3Pn0OCTcigjKRX+pD2Vc/iSNfP0O3zKVDmTnCvojLUDiFfakvE38JRPZ9jMuWQ9a5/9igSGB0CInwE2ifUFk9sraFjfkpwSdL5lQoyFaikj4eRIAAIU1nSv623ZTNuVu2HAptAJUujZY05fP/U+osBOUlB/3cjQi/ebNdyrbHLZ7YoXJz1/5rUSd4iQPfUk1/uhZNVBXhnDpz+khbmgBe/T0dRr8y2n2Hvk+GcPSZhqriaXI5GJG1vHvd8eDf2EQv04qZCnE+DUlk/J+t7tTb8TDsj4tTNwDo0YooSYin2dESXOJCsSggfr7eqyK2DygRTXncC34SLP8Zi5mKwIDAQAB",
  "default_locale": "en",
  "host_permissions": [
    "https://server.sky-follower-bridge.dev/*",
    "https://bsky.social/*",
    "https://twitter.com/*",
    "https://x.com/*",
    "https://www.threads.net/*",
    "https://www.threads.com/*",
    "https://www.instagram.com/*",
    "https://www.tiktok.com/*",
    "https://www.facebook.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sky-follower-bridge@ryo.kawamata"
    }
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+B",
        "mac": "Alt+B"
      }
    }
  }
}