Where it says '''Mozilla''' or '''Firefox''', that is the top of the menu bar that indicates which page you are at. As for the popup, can you attach a screenshot?

Your issue may be caused by Malware. You can run and update the following '''free''' anti virus software: 1. Malwarebytes (Free version) - http://www.malwarebytes.org 2. Spybot Search & Destroy - http://www.safer-networking.org 3.Spyware Terminator - http://www.spywareterminator.com In addition, there are a number of forums you can use to help get rid of your infection. These include: *[http://www.bleepingcomputer.com/forums/|Bleeping Computer] *[http://forums.spybot.info/|Safer-Networking Forums] *[http://www.spywarewarrior.com/index.php|Spyware Warrior Forums] *[http://www.spywarewarrior.com/index.php|SpywareInfo Forums] ~~~~~~ See: http://www.wikihow.com/Take-a-Screenshot-in-Microsoft-Windows After you have saved the screenshot, click '''Browse''' located on the bottom of your reply text box. See the attached screenshot