Examine source code of Activate Reader View – Bookmark Version

{
  "description" : "__MSG_extensionDescription__" ,
  "manifest_version" : 2 ,
  "name" : "__MSG_extensionName__" ,
  "short_name" : "__MSG_extensionShortName__" ,
  "version" : "0.0.2resigned1",
  "developer": {
    "name" : "Florian Kohrt"
  },
  "default_locale" : "en" ,
  "applications": {
    "gecko": {
      "id": "@activatereaderview_bookmark",
      "strict_min_version": "58.0a1"
    }
  },
  "icons" : {
    "48" : "icons/readerModeGray-48.png",
    "96" : "icons/readerModeGray-96.png"
  },
  "permissions" : [
    "bookmarks" ,
    "tabs" ,
    "storage" 
  ],
  "background" : {
    "scripts" : [
      "activatereaderview.js" 
    ]
  }
}