isv: so you experience same stuff that people with gtk3 build (f22)? Are you fine with firefox-40.0-4.fc21 now?

Please test especially compared to: https://admin.fedoraproject.org/updates/FEDORA-2015-13403/firefox-40.0-3.fc22

This update has been unpushed

This update has been unpushed

We need to make a bug for this one. Have a clean reproducer, trying fresh profile and safe mode. Is someone willing to participate on this? Thanks in advance.

Thanks for the feedback guys, could you please try to set layers.offmainthreadcomposition.enabled to false in about:config and retest?

@freddyw That's wrong, thanks for reporting it.

Please test especially if calendar is working for you (in case you're using it).

Please test especially if calendar is working for you (in case you're using it).