You’re not getting anymore security patches, but as long as you keep your browser up to date and generally be careful about what you download and run (as you should already be doing) you’ll likely be just fine.
I’d estimate sometime around 2029 or so the major browsers as well as security software will start dropping support for Windows 10 and at that point you may need to start thinking about moving to something else if you haven’t already done so.
Along the same lines,
slackware.com today:
http://www.slackware.com/
slackware.com in 2001:
http://web.archive.org/web/20010404232132/http://www.slackware.com/