Mihai Boldan, Desktop QA [:mboldan] Reporter
	Description • 8 years ago

[Affected versions]:
- Firefox 48.0a2 (2016-05-16), Firefox 49.0a1 (2016-05-15)

[Affected platforms]:
- Ubuntu 14.04 x64, Windows 10 x64 and Mac OS X 10.9.5

[Steps to reproduce]:
1. Launch Firefox.
2. Go to http://keithclark.co.uk/articles/pure-css-parallax-websites/demo3/.
3. Scroll the page all the way down.

[Expected result]:
- When the page reaches the bottom, the scrolled is stopped.

[Actual result]:
- The page is scrolled more than is supposed to, and it recovers after a few seconds. 

[Regression range]:
- I will investigate this issue asap in order to determine if this is a regression or not.

[Additional notes]:
- The issue is also reproducible if the page is scrolled up, after the STR are performed.

	Alice0775 White
	Comment 1 • 8 years ago

Disabled APZ seems to fix the problem.


Regression window:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=412c5cae8dea7b52da7c6981eec6a2a2884897c9&tochange=cd65b31bdeb565c34ae8e9d56107289ce71d9885

Regressed by: Bug 1253860

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 2 • 8 years ago

Interesting, I'll look into it. Thanks!

	Kartikaya Gupta (email:kats@mozilla.staktrace.com) Assignee
	Comment 3 • 8 years ago

This is the same underlying issue as bug 1264297. The blank space shown is just things not painting properly.