Examine source code of Rust+ Steam Auth Bridge

{
  "manifest_version": 3,
  "name": "Rust+ Steam Auth Bridge",
  "version": "1.0.0",
  "description": "Rust+ Steam Authentication Bridge for accessing https://app.rustplus.online",
  "permissions": [
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "http://localhost/*",
    "https://app.rustplus.online/*",
    "https://shim.rustplus.online/*",
    "https://*.rustplus.online/*"
  ],
  "background": {
    "scripts": [
      "steam-auth-bridge.js"
    ]
  },
  "action": {
    "default_title": "Rust+ Steam Auth Bridge"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "rustplus-steam-auth-bridge@localhost",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}