Web browser.
The major browsers like google chrome, internet explorer, Moxilla firefox have options in their desktop version that can easily enable a user to either turn it off or on. For chrome this can easily be done by looking at the top right hand corner of the browser where there are three dots. When it is clicked on, user should check for settings which is the second to the last from the bottom.Then click on advanced and look out for privacy and security, then click on content which will take the user directly to pop up. User has the option to click on block off or allow.
