Answer Wiki. An MRI is a series of detailed picture of your brain, as they were at the time the MRI was done. They are valid as long as no other changes occur. Basically, if somebody has an MRI today that is normal, and have a stroke or hernia tomorrow, obviously the result will change (You never know).
Web browser. A web browser (commonly referred to as a browser) is a software application for retrieving, presenting and traversing information resources on the World Wide Web. An information resource is identified by a Uniform Resource Identifier (URI/URL) that may be a web page, image, video or other piece of content.
Chrome is a great web browser. Chrome is available for pretty much all computer platforms, including Windows, Mac, Linux, Android and iPhones/iPads. I use Chrome for the majority of my web browsing and recommend it as the best browser available. I like that Chrome auto-updates itself, because it means that when I'm using it I know I'm always using the latest and safest version possible.