A Google search on this shows that it is malware. Try running several malware scanners, Malwarebytes should be able to remove it but it does no harm in running several of the following scanners. It is best to run several as each will pick up things that the others miss. Some scanners you can try are:

• Malwarebytes - http://www.malwarebytes.org/mbam.php
• SuperAntiSpyware - http://www.superantispyware.com/
• Ad-Aware - http://www.lavasoft.com/products/ad_aware_free.php
• Windows Defender - http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
• Spybot S&D - http://www.safer-networking.org/en/home/index.html

If the above malware scanners do not find any malware or can not clear it, you should consider posting in one of these forums for specialized malware removal help:

• http://forums.spybot.info/
• http://www.spywarewarrior.com/index.php
• http://forum.aumha.org/
• http://www.bleepingcomputer.com/forums/
• http://www.spywareinfoforum.com/

I was able to simply unistall it from 'control panel >> programs and features >> then i had to enter the provided code when unistalling the yourprofitclub thing. Also unistalled the programm called something like 'performace enhancer' which had itself installed at the same day. Which was btw a day after the firefox update.

Hope this helps for you 2.

I removed it. I uninstalled "Advance Performance Plat0rm Revenuestreaming" and "Contextual Tool Yourprofitclub" from(?) Control-panel. This malwares were mixed in another software.

I just removed it by following the manual removal guide: http://blog.teesupport.com/remove-yourprofitclub-com-hijacker-virus-yourprofitclub-manual-removal/ And now I am using Malwarebyte to scan my computer to detect whether there are other potential threats. You need to update your security software always :)