This looks like graphics driver issues to me (particularly given that this works as-expected on other Android hardware and on desktop). Reporter: do the issues go away if you enable `gfx.webrender.software`? (visit `about:config` -- type that into your URLbar and hit enter -- and then type in e.g. "render.soft" into the filter box at the top so that "gfx.webrender.scrollbar" shows up, and then tap its entry and tap the "Toggle" button that appears so that it shows "true"; and then force-quit Firefox or reboot your device.) --> reclassifying to WebRender.
Bug 1929799 Comment 6 Edit History
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This looks like graphics driver issues to me (particularly given that this works as-expected on other Android hardware and on desktop). Reporter: do the issues go away if you enable `gfx.webrender.software`? (visit `about:config` -- type that into your URLbar and hit enter -- and then type in e.g. "render.soft" into the filter box at the top so that "gfx.webrender.scrollbar" shows up, and then tap its entry and tap the "Toggle" button that appears so that it shows "true"; and then force-quit Firefox or reboot your device, and then retest to see if the bug is still present.) --> reclassifying to WebRender.
This looks like graphics driver issues to me (particularly given that this works as-expected on other Android hardware and on desktop). Reporter: do the issues go away if you enable `gfx.webrender.software`? (visit `about:config` -- type that into your URLbar and hit enter -- and then type in e.g. "render.soft" into the filter box at the top so that "gfx.webrender.software" shows up, and then tap its entry and tap the "Toggle" button that appears so that it shows "true"; and then force-quit Firefox or reboot your device, and then retest to see if the bug is still present.) --> reclassifying to WebRender. [EDIT: sorry, I initially typed "scrollbar" instead of "software" in one mention of the pref here. :) I've corrected that now, sorry.]
This looks like a case where WebRender is running into graphics driver issues (particularly given that this works as-expected on other Android hardware and on desktop). Reporter: do the issues go away if you enable `gfx.webrender.software`? (visit `about:config` -- type that into your URLbar and hit enter -- and then type in e.g. "render.soft" into the filter box at the top so that "gfx.webrender.software" shows up, and then tap its entry and tap the "Toggle" button that appears so that it shows "true"; and then force-quit Firefox or reboot your device, and then retest to see if the bug is still present.) --> reclassifying to WebRender. [EDIT: sorry, I initially typed "scrollbar" instead of "software" in one mention of the pref here. :) I've corrected that now, sorry.]