Probably worth watching for this problem.
Not strictly a Fx30 problem but unresolved in Fx30 Mainly on WindowsXP
It did have a workaround but no longer. There is an unasigned bug
- Bug 973149 - Animations cause CPU Kernel mode overhead
- STR A quick test on a slow computer is seeing if this rotates as expected (15rpm) try loading this animation
https://en.wikipedia.org/wiki/File:Rotating_earth_%28large%29.gif * - Main forum thread
Firefox is unbearably slow after updating to version 27
/questions/985969
70 replies 569 have this problem 25165 views
- Other possibly related threads I am aware of
Firefox 27 updated automatically; since then it is very slow to open pages, very often freezes (page goes white), and it is often impossible to scroll. /questions/988258
How do I downgrade from v.28 to v.26? /questions/990934 (... fix by removing "Cairo" from the Azure backend no longer appears to work. CPU maxxed out.)
All I can think of as workaround now is suggesting Unofficial third party Firefox Portable ESR Builds
In fact I have already posted a related thread
Hangs with Plugin container starting up unexpectedly
/forums/support-forum-contributors/710178
Probably worth watching for this problem.
Not strictly a Fx30 problem but unresolved in Fx30
Mainly on WindowsXP
It did have a workaround but no longer. There is an unasigned bug
* [https://bugzilla.mozilla.org/show_bug.cgi?id=973149 Bug 973149 - Animations cause CPU Kernel mode overhead ]
** Animations as trivial as an icon on a tab are enough to slow down Firefox [https://bugzilla.mozilla.org/show_bug.cgi?id=973149#c13 #c13]
** There are STR resulting in a proper regression range even an untested suggested backout [https://bugzilla.mozilla.org/show_bug.cgi?id=973149#c6 #c6]
* STR A quick test on a slow computer is seeing if this rotates as expected (15rpm) try loading this animation <br /> https://en.wikipedia.org/wiki/File:Rotating_earth_%28large%29.gif [https://bugzilla.mozilla.org/show_bug.cgi?id=973149#c0 *]
* Main forum thread <br />''Firefox is unbearably slow after updating to version 27'' <br />[/questions/985969]
''' 70 replies 569 have this problem 25165 views'''
* Other possibly related threads I am aware of <br /> ''Firefox 27 updated automatically; since then it is very slow to open pages, very often freezes (page goes white), and it is often impossible to scroll. [/questions/988258]''<br /> ''How do I downgrade from v.28 to v.26?'' [/questions/990934] (... '' fix by removing "Cairo" from the Azure backend no longer appears to work. CPU maxxed out.'')<br />
All I can think of as workaround now is suggesting Unofficial third party Firefox Portable ESR Builds
* http://portableapps.com/apps/internet/firefox-portable-esr
---------------
In fact I have already posted a related thread <br />''Hangs with Plugin container starting up unexpectedly'' <br /> [/forums/support-forum-contributors/710178]
Modified by John99 on