>>> My Info: Win7_64, Nightly 49, 32bit, ID 20160526082509 STR_1: 1. Open url https://gmatanswers.com/posts 2. Open debugger, set breakpoint at "DOMMouseScroll" event, rotate mouse wheel down once 3. Prettify the script where debugger stops 4. Set breakpoint at the line "return g.call(d, f)" in the event handler. Click "Click to resume" 5. Click "Step in" button AR: The 1st item in call stack disappears. Current line in debugger isn't scrolled into view ER: Step 5 - 1st call stack item should stay. Current line should be automatically scrolled into view This is regression from bug 1226810. Regression range: > https://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=e735b7607ae25e5769d49fb848292d56889330fe&tochange=7489db357bd48b2bd1751b474c3a91cfa55a9420@ (Unavailable until Jan 4) Brian Grinstead [:bgrins]: It seems that this is a regresion caused by your change. Please have a look.
Component: Developer Tools: Canvas Debugger → Developer Tools: Debugger
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