I attempted to reproduce this as well. Here is what I noticed about your example (https://codepen.io/lemmin/pen/xRyXMZ): > Inside of `about:config`, when `layers.async-pan-zoom.enabled = true` it behaves the following way for me using a track pad: > > * Initiate scrolling by swiping up/down, and leave your fingers on the track pad. > * You should now be able to swipe left/right to smoothly move the scroll bar horizontally. > > Inside of `about:config`, when `layers.async-pan-zoom.enabled = false` it behaves the following way for me using a track pad: > > * Swiping up/down will both initiate scrolling and move the scroll bar horizontally. I am not sure which, if either, of these behaviors is correct, but I am going to re-classify this bug as `Panning and Zooming`. :botond, could you take a look at this when you get a chance?
Bug 1611949 Comment 3 Edit History
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I attempted to reproduce this as well. Here is what I noticed about your example (https://codepen.io/lemmin/pen/xRyXMZ): > Inside of `about:config`, when `layers.async-pan-zoom.enabled = true` it behaves the following way for me using a track pad: > > * Initiate scrolling by swiping up/down, and leave your fingers on the track pad. > * You should now be able to swipe left/right to smoothly move the scroll bar horizontally. > > Inside of `about:config`, when `layers.async-pan-zoom.enabled = false` it behaves the following way for me using a track pad: > > * Swiping up/down will both initiate scrolling and move the scroll bar horizontally. [Note]: toggling `layers.async-pan-zoom.enabled` requires a browser restart to take effect. I am not sure which, if either, of these behaviors is correct, but I am going to re-classify this bug as `Panning and Zooming`. :botond, could you take a look at this when you get a chance?
I attempted to reproduce this as well. Here is what I noticed about your example (https://codepen.io/lemmin/pen/xRyXMZ): > Inside of `about:config`, when `layers.async-pan-zoom.enabled = true` it behaves the following way for me using a track pad: > > * Initiate scrolling by swiping up/down, and leave your fingers on the track pad. > * You should now be able to swipe left/right to smoothly move the scroll bar horizontally. > > Inside of `about:config`, when `layers.async-pan-zoom.enabled = false` it behaves the following way for me using a track pad: > > * Swiping up/down will both initiate scrolling and move the scroll bar horizontally. NOTE: toggling `layers.async-pan-zoom.enabled` requires a browser restart to take effect. I am not sure which, if either, of these behaviors is correct, but I am going to re-classify this bug as `Panning and Zooming`. :botond, could you take a look at this when you get a chance?