I am getting a message on a yellow banner on various websites, most recently the New York Times, that reads: A webpage is slowing down your browser. What would you like to do? Stop it, Wait. An image is attached. If I select Stop It it sometimes goes away and sometimes comes back. It has recurred over several logins to the Times and it is very annoying as it impedes the fast loading of the webpage content and slows any activity. I would like to know how to permanently get rid of it.