With massive increase in the prices of the cryptocurrencies over the last couple of months, websites hosting cryptocurrency miners are increasingly becoming a major problem for the smartphone owners. Opera has announced that it has updated both its main Android browser and Opera Mini to block the cryptocurrency miners. If you switch on the ad-blocking feature in the browser, the miners will automatically be blocked. Opera is the first major browser developer to bring this feature and the company had earlier provided the same blocker in its desktop browser. “When you browse the web, there are no visual clues that your device is exposed to mining. A single webpage you visit can take up to 4.5 hours of your battery time, if you keep the tab open. This often turns out to be just the battery time you needed to use a ride-hailing app or check the map to get home,” said Jan Standal, VP Product Marketing at Opera, in a statement.