Examine source code of Checkmate - Cashback, Savings & Rewards.

{
  "manifest_version": 3,
  "name": "Checkmate - Cashback, Savings & Rewards.",
  "version": "9.6.1",
  "description": "Automatically earn cashback, apply codes and unlock exclusive deals!",
  "permissions": [
    "tabs",
    "storage",
    "unlimitedStorage",
    "cookies",
    "webRequest",
    "declarativeNetRequestWithHostAccess"
  ],
  "host_permissions": [
    "https://*/*"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "background": {
    "scripts": [
      "build/background.js"
    ]
  },
  "icons": {
    "16": "assets/16-logo.png",
    "48": "assets/48-logo.png",
    "64": "assets/64-logo.png",
    "128": "assets/128-logo.png"
  },
  "action": {
    "default_icon": "assets/icon-grey.png",
    "default_popup": "popup.html",
    "default_title": "Checkmate"
  },
  "content_scripts": [
    {
      "js": [
        "build/content.js"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "build/*",
        "assets/*"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@joincheckmate.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "authenticationInfo",
          "browsingActivity",
          "websiteActivity",
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}