While the extension is mainly for allowing users to bookmark wikipedia sites, the extension request permission to access data of non-Wikipedia sites such as wikivoyage, wikibooks etc. Why does it need permission to access non-Wikipedia sites' data?
Further, the extension seems to too lousy in that it even allows me to add Commons user pages to the Wikipedia reading list. Not only that it even allows to add Special:Preferences and every single page which makes no sense to add to a Wikipedia reading list.