(This tip is inspired from the following document Spam/Virus Facebook at malekal.com). During the recent months, spam beginning to rage on Facebook.
Posts contain links that offer view videos and in order to view these videos, the user must download a codec or Flash plug-in.
In reality it is a Firefox extension that once installed will post such messages when connecting to Facebook.
So, if you download these extensions you are helping in the propagation SPAM.
The authors receive money for each consultation at the videos via the ads on the page.
It is a way to create traffic artificially.
Here is an example of video nutella + bit.ly links that lead to a buzz video:
A fake message that prompts download the divx codec to view the video:
Another example: An Add-On to know what people can view your Facebook profile.
So you must remove these extensions so that the messages on Facebook stop:
Firefox: extensions are accessible from the Tools menu and then Add-ons.
Google Chrome extensions are accessible from the wrench icon at the top right and then Tools and Extensions
In the case of Firefox, you can right-click and Show details for information on the extension. If no information (website) is given, it is certainly a malicious extension.
In doubt for an extension, you can disable it.
Disconnect and reconnect to Facebook after a few hours and check if the messages stopped.
If so, you can then uninstall the extension.
When in doubt, change your Facebook password AdwCleaner
AdwCleaner removes adware and PUPs/LPIS: Potentially unwanted programs.
Download AdwCleaner (from Xplode) on the desktop.
Run it and click [Remove] and wait for the scan to be completed
AdwCleaner will then remove adware and other unnecessary programs/PUPs. Conclusion
Be careful about the software you install.
Original FAQ by Malekal_morte