Opera miners protection
The browser developer Opera launched a beta version of Opera 50, the first browser with a built-in blocker for hidden NoCoin miners. This function offers protection against built-in scripts for mining, which use the site visitor's processor, without the consent of the owner.
To enable NoCoin, users need to go to the browser settings. Its parameters are among the options of ad blocker. In the beta version, NoCoin will be enabled by default.
I think most antiviral apps and adblockers stop crypto mining by default.