I am suspicious of such a notice. Do not install it yet ! !

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Thank you!

Thank you for responding so quickly.

The first screenshot shows the alert. Then i click on "show". Then this next screenshot shows what appears. I click on the "install" but nothing happens. The third screenshot shows that Spectrum Security Suite is in need of an extension.

I went to the site and see nothing about a Extension. Not a lot of info on them I would suggest doing this https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware and see what turns up. AdwCleaner should be used, if need help with the log file post in Malwarebytes and wait for a reply, Only post in 1 only anti-malware forum site. Please let us know if this solved your issue or if need further assistance.

There was another thread about this extension. It was installed but was not enabled. Can you check for that:

You can view, enable/disable, and often remove extensions on the Add-ons page. Either:

• Command+Shift+a (Windows: Ctrl+Shift+a)
• "3-bar" menu button (or Tools menu) > Add-ons
• type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions. Then check for that one on the right side -- disabled extensions cluster at the bottom. Can you get it enabled?

Bear in mind that any extensions Firefox installs on its own are hidden from this page, so everything listed here is your choice (and your responsibility) to manage.

Thank you! Thank you! All good now. And Thank you to everyone who replied.