Hi,

Yes, sure looks like you've got some malware.

Go to the 3-bar menu (or 'Tools') => Addons => Extensions and look for any unfamiliar or suspicious looking extensions.

When you find any : remove them.

Do the same in your system's Control Panel and look for anything suspicious.

However : most malware will be 'hiding' somewhere , so let's run malware scans :

Further information can be found in this article : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware?cache=no

Run most or all of the listed malware scanners. They all work differently - what one program doesn't pick up, the other might.

Also see : https://www.reddit.com/r/techsupport/comments/62bm16/virus_just_wont_leave_tried_malwarebytes_and_mse

Seperate issue :

Your system details show that you need to update your Adobe Flash Player - you're running a very old version, which can cause problems. Would you please uninstall your current version and install the latest version, which is 28.0.0.161

Uninstaller : https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html

https://get.adobe.com/flashplayer/

Note : some 'extras' may be offered in the download.