Video, including TV-channels is always choppy in Firefox due to disk swapping. I have just refreshed the browser and it did not help to any extent. However, if I open the same video in Chrome, it is smooth, always (!) And I do not close Firefox - it is still running in parallel to Google's browser, increasing swapping needs of the system (but it is not a problem for Chrome at all). Please let me know what I can try here. The problem is probably in the method of data caching on disk in Firefox. Thank you!