>>> My Info: Win7_64, Nightly 49, 32bit, ID 20160526082509 STR: 1. Download and extract attached testcase in a folder with short full name 2. Open "2016.04.18 22-35-57 Диалоги.htm" in Firefox 3. Drag the resizer at the bottom of the page up and down several times AR: The resizer oscillates near the mouse pointer ER: The resizer should strictly follow the mouse pointer [OOT] Just reported 11 bugs, as requested .-. This is regression from bug 1242690. Regression range: > https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=0c1e74f83b4187dc5563b2fc4a64f19065132700&tochange=1d931aacb06118b0c182fea0d6d3d529b380cdb6

This sounds like it might be the same underlying issue as bug 1259781.

Like bug 1259781, I'm expecting this to be fixed by bug 1280667 as well. arni, could you verify this now works in the latest nightly build? Thanks!

You started work in bug 1280667 (duplicate of this one) w/o regression range, and ignored this bug. After that, I can't afford testing this. But I think it's fixed, given that bug 1280667 is duplicate. * "you" == Firefox team

(In reply to arni2033 from comment #4) > You started work in bug 1280667 (duplicate of this one) w/o regression > range, and ignored this bug. We didn't ignore this bug. Work was ongoing in bug 1259781 which I expected to fix this bug too. That fix didn't work out, but another approach (in bug 1280667) did. Anyways, I'm going to close this as a duplicate. Please feel free to re-open if you still see this problem.