Note: this is a follow-up issue filed for Bug 1137211. Reproducible on: Nightly 40.0a1 (2015-04-06), Aurora 39.0a2 (2015-04-06), Beta 38.0b2-build1 (20150406174117) Affected platforms: Windows 7 (x64), Ubuntu 14.04 (x64), Mac OS X 10.9.5 Steps to reproduce: 1. Launch Firefox. 2. Open a Reader View compatible page - (e.g.) http://www.bbc.com/future/story/20150402-do-colours-really-change-our-mood 3. Click the "Enter Reader View" button from the Location Bar. 4. Click the "Type controls" (Aa) button from Reader View's controls bar. 5. Select text from the page currently displayed in Reader View, using the mouse cursor. Expected result: The text is selected and the font panel is dismissed. Actual result: The text is indeed successfully selected but the font panel remains in focus. Happens when selecting images as well.
The panel disappears for me when the mousebutton is released -- it's just visible *while* selecting text. We should be listening for mousedown, not click.