Microsoft has ended support for Windows XP and Vista, but people refusing to migrate for one reason or another have had a workaround for browser use. Rather than use the vulnerable Internet Explorer browser, they used Google's Chrome browser.
Well, kiss that workaround goodbye. Google has announced via blog post that effective April 2016, Chrome will no longer receive updates and security fixes. It will still run, it just won't be patched, just like Internet Explorer.
Mac users, no snickering. Google is also ending support for versions older than OS X Mountain Lion (10.8). Of course, both XP and OS X users have a free upgrade option, although many XP machines might not have the muscle to handle Windows 10.
If you are sticking with Windows XP for whatever reason, there is still one option: Mozilla Firefox. The Mozilla Foundation hasn't ended support for XP yet. In fact, it will support XP Service all the way back to Pack 1.