How is this occurring? Are there words such as "urgent update"? Can you take a screenshot and post it here?

My print screen key does not work. How do I take a screenshot? I really don't remember if it said "urgent update".

Thanks for responding and I look forward to your future help with this!

Sue

Hello,

If you need help to create a screenshot, please see How do I create a screenshot of my problem?. Additional tools are listed there as well.

Once you've done this, attach the saved screenshot file to your forum post by clicking the Browse... button below the Post your reply box. This will help us to visualize the problem.

Thank you!

" Is this for real?"

No, that's a fake update. You are correct, Firefox doesn't do updates in that manner.

See this support article and verify that is what you saw. https://support.mozilla.org/en-US/kb/i-found-fake-firefox-update

That scam has been around for almost 7 months now, and if is proving to be hard to stop. It seems that one or two new domains sprout up each day, so by the time users report those domains to the Safe Browsing website and those domains get added to the blocklist, the person producing that crap that has already moved on to new domains. And we suspect that infected advertising networks are propagating that crap to somewhat innocent websites.

uBlock Origin is effective at blocking that crap from appearing in Firefox; I never saw that until I disabled uBlock Origin and caught a few of those while they were still active. https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/