I can confirm the problem on OS X 10.15, 16" MBP with external trackpad. STR as described by the reporter in the last comment 11: - Install extension Zoom Page WE - Restart Firefox - Try pinch-zooming The problem seems to be that the extension reacts to the same pinch gesture, triggering both APZ and reflow zoom at the same time. This gives a stuttering and fast zooming effect.
Bug 1693249 Comment 12 Edit History
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I can confirm the problem on OS X 10.15, 16" MBP with external trackpad. STR as described by the reporter in the last comment 11: - Install extension Zoom Page WE - Restart Firefox - Try pinch-zooming (edit: on a page other than about:newtab or AMO) The problem seems to be that the extension reacts to the same pinch gesture, triggering both APZ and reflow zoom at the same time. This gives a stuttering and fast zooming effect.
I can confirm the problem on OS X 10.15, 16" MBP with external trackpad. STR as described by the reporter in the last comment 11: - Install extension Zoom Page WE - ~Restart Firefox~ (edit: no restart required) - Try pinch-zooming (edit: on a page other than about:newtab or AMO) The problem seems to be that the extension reacts to the same pinch gesture, triggering both APZ and reflow zoom at the same time. This gives a stuttering and fast zooming effect.