Closed Bug 1245523 Opened 6 years ago Closed 1 year ago

Blink of wrong scroll position when hiding or showing dynamic toolbar


(Firefox for Android Graveyard :: Toolbar, defect, P5)

43 Branch


(firefox47 wontfix, firefox48 wontfix, firefox49 wontfix, firefox50 wontfix, firefox51 fix-optional)

Tracking Status
firefox47 --- wontfix
firefox48 --- wontfix
firefox49 --- wontfix
firefox50 --- wontfix
firefox51 --- fix-optional


(Reporter: cwiiis, Unassigned)



(Keywords: regression)


1. Navigate to a page long enough to scroll vertically and hide the dynamic toolbar.
2. Scroll down to hide the toolbar
3. Scroll up enough to show a little over half of the toolbar


Toolbar animates into position


Toolbar animates into position, but page flashes briefly with the wrong scroll position.

I've observed this on a 10.1" Samsung Galaxy Tab 3 and a Tesco Hudl 2 tablet. These are both Intel-chip tablets (though different generations). The Samsung tablet is running Android Kitkat with lots of awful Samsung customisations and the Hudl2 is running a mostly-stock Android Lollipop.
kats, is there an ETA on this bug? The proper fix for bug 1245493 depends on it.
Flags: needinfo?(bugmail.mozilla)
At the moment there is no ETA. The plan here is to converge with other browser vendors on a standard behaviour [1] for the browser when the toolbar is shown/hidden. Right now we fire resize events to content and change the scroll position and such; if we can avoid doing some of that work this bug will probably go away or be easier to fix.

[1] WIP at
Flags: needinfo?(bugmail.mozilla)
Version: unspecified → 43 Branch
Re-triaging per

Needinfo :susheel if you think this bug should be re-triaged.
Priority: P3 → P5
We have completed our launch of our new Firefox on Android. The development of the new versions use GitHub for issue tracking. If the bug report still reproduces in a current version of [Firefox on Android nightly]( an issue can be reported at the [Fenix GitHub project]( If you want to discuss your report please use [Mozilla's chat]( server and join the [#fenix]( channel.
Closed: 1 year ago
Resolution: --- → INCOMPLETE
Product: Firefox for Android → Firefox for Android Graveyard
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