Created attachment 671747 [details] GLXInfo on a PC for which FF Nightly w/ OMTC is slower than stable 16.0.1 User Agent: Mozilla/5.0 (X11; Linux i686; rv:16.0) Gecko/20100101 Firefox/16.0 Build ID: 2012101000 Steps to reproduce: Use Nightly with OMTC enabled. I go to a long page (http://en.wikipedia.org/wiki/Paris), and try to scroll with mouse, or with drag'n'drop on the scrollbar. Actual results: Scrolling is really slow, either with the mouse wheel or the scrollbar. Expected results: It should have been smooth, as in FF 16.0.1
Same issue for me : Firefox 19.0a1 Mozilla/5.0 (X11; Linux x86_64; rv:19.0) Gecko/19.0 Firefox/19.0 The slowness is from low to high depending of the page.
Mass tracking-e10s flag change. Filter bugmail on "2be0fcce-e36a-4e2c-aa80-0e3d33eb5406".
WFM using current nightly. Can you still reproduce when using a current version?
Except the fact that the previous setting to enable OMTC is not there anymore (layers.offmainthreadcomposition.enabled), I cannot reproduce this anymore in Nightly. If you have any information about how to enable/disable OMTC. I'll be glad to recheck one last time.
ISTM we just close this WFM