If you get a pop-up message asking to update Firefox or plugins or scanning for malware then such a message is likely a scam and you should NEVER respond to such an alert to avoid getting infected with malware. *only update Firefox via "Help > About" or by downloading and installing Firefox from the Mozilla server and never via a pop-up or link on a web page. *plugins should only be updated via the plugin itself or by visiting the home page of the plugin. See also: *https://support.mozilla.org/en-US/kb/i-found-fake-firefox-update ---- Do you get this pop-up randomly or when you visit specific websites? See also: *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware

Go to the [https://addons.mozilla.org/en-US/firefox/ Mozilla Add-ons Web Page] {web Link} (There’s a lot of good stuff here) and search for a good ad / pop-up blocker.