Examine source code of IMDb to StreamIMDb

{
  "manifest_version": 2,
  "name": "IMDb to StreamIMDb",
  "version": "1.0",
  "description": "Right-click on IMDb pages to redirect to streamimdb.ru",
  "permissions": [
    "activeTab",
    "tabs",
    "contextMenus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5c191ad3-9b66-434a-8c34-8767b4676d6b}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}