Examine source code of Force Reader View

{
  "description": "__MSG_extensionDescription__",
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "short_name": "__MSG_extensionShortName__",
  "version": "0.1.1",
  "developer": {
    "name": "Salvora"
  },
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "@forcereaderview",
      "strict_min_version": "130.0"
    }
  },
  "icons": {
    "16": "icons/reader-mode-16.png",
    "32": "icons/reader-mode-32.png",
    "48": "icons/reader-mode-48.png",
    "96": "icons/reader-mode-96.png"
  },
  "permissions": [
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "forcereaderview.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/reader-mode-32.png",
    "default_title": "__MSG_browserActionTitle__"
  },
  "commands": {
    "activate-reader-view": {
      "suggested_key": {
        "default": "Ctrl+Alt+Y"
      },
      "description": "Force Reader View"
    }
  }
}