Created attachment 8710261 [details] screenshot Build Identifier: https://hg.mozilla.org/mozilla-central/rev/6764bc656c1d146962d53710d734c2ac87c2306f Mozilla/5.0 (Windows NT 10.0; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0 ID:20160120063519 Latest m-c hourly. Reproduced on Win7 and Windows10[vm]. Reproducible: 80% or more Steps To Reproduce: 1. Open several tabs(e.g. [about:home][about:home][about:home]) 2. Click [x]close button in the caption 3. Do not move mouse pointer Actual Results: The contents of dialog box is empty. Expected Results: Not so Regression window: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=a786af9186eba708a37ac59df94fa5e148dbe4a3&tochange=415f713d58b0803cf143f0a605ed79409d57fc1d Suspected: Bug 1239861
Summary: Contents of dialog window is empty until mouse over the dialog → Contents of dialog window is empty
Setting layers.acceleration.disabled = true seems fix the problem
Dup of Bug 1241363
(In reply to Gary [:streetwolf] from comment #2) > Dup of Bug 1241363 I cannot reproduce Bug 1241363.
But maybe same root cause.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1241363
2 years ago
No longer blocks: 1239861
status-firefox46: affected → ---
fixed by backed out bug 1239861
Status: RESOLVED → VERIFIED
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