>>> My Info: Win7_64, Nightly 51, 32bit, (2016-08-25) STR_1: 0. Set DPI level -> 125% in your OS. Set layout.css.devPixelsPerPx -> 1.0 (my normal config to work around those bugs of blurry UI that Firefox team wants me to experience) 1. Open http://stewd.io/pong/ 2. Click "Play" AR: Windows open in wrong place: the right window (/player2.html) opens far from the right side of the screen, while the left window (/player1.html) opens near the left side of the screen ER: Windows should open symmetrically with respect to the center of the screen. Just like before bug 1288760. Just like in other browsers (I checked GoogleChrome) Note: So since Firefox 47 (bug 890156) it's just constant bugs that do not cease. Huh. "Enhancements" This is regression from bug 1288760. Regression range: > https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=1ea96bf70664dbac2584881fcf39408733278e46&tochange=4eb5775fd334887121a7a779a27e6727acdcb25f
Why is this bug closed even without an explanation? It looks a valid bug report to me. That said, I guess this is already fixed (bug 1305278). > >>> My Info: Win7_64, Nightly 51, 32bit, (2016-08-25) This is terribly old. Please use the latest build to report a bug.