Sorry you are having problems. Thanks for a good descriptive post. There is a testcase; see under; does the globe spin slowly ? Just a hunch at the moment but maybe the problem described in this thread. * ''Firefox is unbearably slow after updating to version 27'' [/questions/985969] ** summary [/questions/985969?page=3#answer-546599] ** my general comments [/questions/985969?page=3#answer-546520] * Useful page as '''testcase''' globe should spin at 15 RPM <br /> https://en.wikipedia.org/wiki/File:Rotating_earth_%28large%29.gif Not engineers have now started to investigate so there may be further news later in the week There is a testcase as above. Bugzilla used for bug tracking and reporting *Please only vote though do not add comments unless it is brand new information, or it is something asked for in the bug. ** https://bugzilla.mozilla.org/page.cgi?id=voting.html **https://bugzilla.mozilla.org/page.cgi?id=etiquette.html **[https://bugzilla.mozilla.org/show_bug.cgi?id=973149 Bug 973149 - Animations cause CPU Kernel mode overhead] **Follow by using CC <br />You are able to follow the bugs by using the [Save] option whilst the []CC option is checked. ** Note you need an email address to register with bugzill and that will be made public