Tried to get out of it, close the popup, nothing so had to close the browser. Went to software update and checked, no updates (usually not any more). So I know it was malware/adware of some kind. But I didn't think to take a screen capture.
So I go back to the local paper site and get a different popup. Makes it look like Adobe Flash. I go to that site if I want to check for updates and there usually aren't any but I didn't want to bother. I didn't click on the cancel like I did the first time. It wouldn't let me anyway.
So I did a screen capture, again it wouldn't let me close the popup, using the red button above the flash icon, so I had to close the browser but I took a screen capture this time. Cleared my cache.
I don't know how long i'm going to have to put up with this or who is trying to trick me into installing what I'm almost positive is malware.
Oh, Damn. These are ads from Google that are popping these up. Yes, they will try to install malware if you let them. Google does not santion them but the people who buy the ads from Google and get them on Google's rotation start out with legitimate ads, then start tossing these malware ads in and run them as often as they can until Google catches them at it. Then they get banned by Google. They change their name, open up under another name and repeat. Rinse, repeat. Over and over.
When you get this again, force quit Safari and reload Safari holding down the shift key. That will start Safari with no tabs running and you can return to your newspaper without that ad. Should be OK. If you need to, clear cookies and caches. You may have to log back onto sites that normally would remember you, etc., but its better than this malware ad hell.
If you DO use FLASH (heaven forbid, Just Say NO to FLASH!) and absolutely have to use it, go directly to Adobe.com and check for the latest update there. That small alert about "Flash player is available for your Mac and is ready to install" is certainly bogus.