Easily get information about the browser.
You can install the plugin using Bower:
bower install agent.jswindow.agentDetails.screen;
window.agentDetails.viewport;
window.agentDetails.zoom;
window.agentDetails.pixelRatio;
window.agentDetails.browser;
window.agentDetails.browserVersion;
window.agentDetails.browserMajorVersion;
window.agentDetails.mobile;
window.agentDetails.os;
window.agentDetails.osVersion;
window.agentDetails.cookies;