Google Chrome's Mute Tab feature lets you kill noise from auto playing videos

Many users are fed up with sound that is played from videos that play automatically on their Facebook timeline. Google has rightly recognized that this may irritate many users, and has accordingly introduced a 'Mute Tab' feature in Google Chrome, which makes sure that you can mute the sound for the videos, and users can choose what video content they want.

You can select this option by right clicking the tab in which the page is open, and select the Mute Tab option.