Examine source code of Solimons ECSR

{
  "manifest_version": 2,
  "name": "Solimons",
  "version": "2.1",
  "description": "Display Ecomons item values on ECSR catalog, trades, and profiles",
  "icons": {
    "16": "imgs/icon16.png",
    "48": "imgs/icon48.png",
    "128": "imgs/icon128.png"
  },
  "permissions": [
    "storage",
    "https://ecsr.io/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://ecsr.io/catalog*",
        "https://ecsr.io/users/*/profile*",
        "https://ecsr.io/Trade/*",
        "https://ecsr.io/My/Trades.aspx*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ttokenn21@gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}