[Note]: - Logged based on Bug 1274032 Comment 22 [Affected versions]: - Firefox 51.0a1 (2016-09-04) [Affected platforms]: - Windows 10x64, Mac OS X 10.10.5, Ubuntu 16.04x64 [Steps to reproduce]: 1. Launch Firefox. 2. From about:config, enable the devtools.responsive.html.enabled pref. 3. While the about:config page is displayed, enable the RDM tool from both, Menu bar and Toggle tools. [Expected result]: - Only one notification error is displayed. [Actual result]: - Both notification errors are displayed (see http://imgur.com/Lfy0Iwo). [Regression range]: - This is not a regression.
Priority: -- → P3
Whiteboard: [multiviewport] [triage] → [multiviewport][reserve-rdm]
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