1221241 - Changing the URL #hash in JS (using location.hash or history.pushState()) disrupts scrolling on FF for Android

Status: RESOLVED FIXED

(Firefox for Android Graveyard :: Toolbar, defect)

Description

[n.mussin]

Attachment: bug.html

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:41.0) Gecko/20100101 Firefox/41.0
Build ID: 20151016093648
Firefox for Android

Steps to reproduce:

Call history.pushState() or history.replaceState() during scrolling. Open the attached html file on mobile Firefox to see the problem (the problematic code is at the bottom).


Actual results:

Scrolling completely stops and the page sometimes visibly "jumps" a few pixels


Expected results:

Nothing. Neither should the scrolling come to a full stop, nor should the whole page jump visually when a history entry is pushed or replaced.

Comment 1

[Kevin Brosnan [Ex-Mozilla]]

Confirmed behavior on Firefox 45 using a Nexus 5x.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

Tested this with the C++ APZ and it appears to be fixed by that. Marking dependent on apz-fennec.

Comment 3

[Mark Finkle (:mfinkle) (use needinfo?)]

riding with APZ

Comment 4

[n.mussin]

Update: This bug occurs whenever the URL #hash changes, not only in history.pushState(), but also on window.location.hash = "#foo";

Comment 5

[Kartikaya Gupta (email:[e-mail])]

This should be fixed in the latest nightly as we have turned on the C++ APZ code. I'm changing the dependencies here so we can mark this fixed once we decide to ship the C++ APZ on Fennec.

Comment 6

[Kartikaya Gupta (email:[e-mail])]

APZ has shipped in Firefox 48, so closing this out.