Maybe the browser you are using doesn't have this function; You can use the mobile QQ browser; Is a leading online software in the world, with super X5 kernel and cloud technology, extremely fast playing kernel and high-definition smooth viewing. Its Sina Weibo, popular browsing, subscribing to topics, reading novels, watching the weather, online shopping and so on. You can enjoy the smoothest mobile Internet experience. And has a safe and convenient payment function, so that you can easily experience the convenience and speed of online payment;