If you are a chrome user, it is recommended to be very careful when installing extensions or third-party components, you always have to verify that they come from a reliable source. Malta programmer Andreas Grech developed a plugin using JQuery to track users' login information and send it to them by email, the result he had was favorable obtaining access to twitter, facebook, gmail accounts, etc.
The Chrome browser allows the installation of extensions developed by third parties to expand the possibilities of the browser, these extensions developed in JavaScript and HTML allow the manipulation of the Document Object Model and through accessing and modifying the structure of HTML and XML documents, but at their own expense. It also allows you to read the information in form fields and send them via mail using a simple AJAX routine.
For more details about the code for this plugin, please visit the developer's website: http://blog.dreasgrech.com/
So far Google has not ruled on this, so it is recommended to be very careful when installing extensions in Chrome.
Source: http://thenextweb.com/