Google bought Motorola together with their patents.
http://www.fastcompany.com/1773548/google-bought-motorola-mobility-12-point-five-billion-what-it-means
Google Chrome and your problem will be fixed ...
Firefox becomes more laggier with each new version.
http://www.google.com/chrome/intl/en/landing_chrome.html?hl=en&hl=en&