MplayerX browser extension will get installed on the computer without user’s consent. This is precisely the reason why it was named as potentially unwanted program or PUP. As you surf the net, MplayerX may annoy you with pop-up advertisements and occasional browser redirects. There are also times that unwanted add-on such as this can manipulate certain settings on the browser.
It is usually by accident that MplayerX gets inside the computer system. Users are just a victim of malicious programs bundled into one attractive piece of product. Normally, they will disguise as important freeware, software update, or media player. Once said program is installed, other hidden files and nasty add-on like MplayerX is also get loaded not specific to computer user.
About MplayerX (from downloadmplayerx.com)
MplayerX is a capable and multifunctional media player for Mac that features generous support online and sample tools available to the user, making it a very capable tool for watching videos.
Existence of MplayerX inside Internet Explorer, Google Chrome, Mozilla Firefox or any other browser program implies that something is wrong with the computer. It is due to adware presence that have managed to sneak into the system and installed MplayerX without asking for user’s permission.
Technically speaking, MplayerX acts as conveyor for a number of advertisements to show up on your browser. It appends configuration on your Internet application in order to implicate payload such as pop-up ads as well as browser redirection. The sole purpose of MplayerX is to deliver ads and endorse products that greatly benefit its authors. In short, the subject is a profit-generating extension.
Displaying ads is not the only function of MplayerX. It may also track web browsing activities on compromised computer. This junkware will record visited web sites and other sensitive information which is generated as a report to be sent to adware author.