Does the chrome installed in BeagleBone supports full javascript , html5

i want to use BeagleBone Black for one of my project. Before buying it i need to know some information .

Does the web browser of ubuntu installed in BeagleBone Black supports all features of JavaScript , HTML 5? I want to play video file using jwplayer ( javascript based web player) in the web browser. Will it play the video without delay?

Does any body has any experience