Examine source code of Forget about this site

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "1.8.0",
  "homepage_url": "https://github.com/blaise-io/forget-about-this-site#readme",
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "tabs",
    "browsingData",
    "downloads",
    "history",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "/background.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "forget-about-this-site@blaise.io"
    }
  },
  "icons": {
    "256": "/icons/icon.png"
  },
  "page_action": {
    "default_icon": "/icons/icon.png",
    "browser_style": false
  },
  "options_ui": {
    "page": "/options.html",
    "browser_style": true
  },
  "commands": {
    "_execute_page_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+X"
      }
    }
  }
}