Examine source code of Citizen Hangar Pledge Sync

{
  "manifest_version": 2,
  "name": "Citizen Hangar Pledge Sync",
  "description": "Sync Robert Space Industries pledges to the Citizen Hangar backend; pairing and uploads",
  "version": "1.3.4",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "citizenhangar@sctr.space",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent",
          "websiteActivity"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "storage",
    "alarms",
    "https://citizenhangar.space/*",
    "https://robertsspaceindustries.com/*",
    "http://localhost/*",
    "http://127.0.0.1/*"
  ],
  "browser_action": {
    "default_title": "Citizen Hangar Pledge Sync",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://127.0.0.1/*",
        "http://localhost/*",
        "https://citizenhangar.space/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}