As discussed with Milan today, enabling apz.frame_delay.enabled on Nightly builds is a good way to flush out any other bugs with it, and gather user feedback on it.

Comment on attachment 8890520 [details] Bug 1384708 - Enable apz.frame_delay.enabled on Nightly builds. https://reviewboard.mozilla.org/r/161658/#review166964

We're sorry, Autoland could not rebase your commits for you automatically. Please manually rebase your commits and try again. hg error in cmd: hg rebase -s 2020486d2073 -d 174e8648aae9: rebasing 410291:2020486d2073 "Bug 1384708 - Enable apz.frame_delay.enabled on Nightly builds. r=kats" (tip) merging modules/libpref/init/all.js warning: conflicts while merging modules/libpref/init/all.js! (edit, then use 'hg resolve --mark') unresolved conflicts (see hg resolve, then hg rebase --continue)

Sorry about that, I just landed https://hg.mozilla.org/integration/autoland/rev/174e8648aae9 which probably caused the conflict.

Pushed by bballo@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/49555e689cc8 Enable apz.frame_delay.enabled on Nightly builds. r=kats

It's now been a week, and I haven't heard anyone complain about this change. That's encouraging :)