1177112 - Flicker when scrolling to the bottom of certain pages

Status: RESOLVED FIXED

(Firefox for iOS :: General, defect)

Description

[Waldi]

User Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 8_3 like Mac OS X) AppleWebKit/600.1.4 (KHTML, like Gecko) FxiOS/1.0 Mobile/12F70 Safari/600.1.4
Firefox for Android

Steps to reproduce:

Went on:

https://support.mozilla.org/en-US/products/mobile


Actual results:

If you scroll down, the website will "jump" when you reach the end of the list


Expected results:

Smooth ending of the list!

If you change the language, this problem will solve until the next time

Comment 1

[Aaron Train [:aaronmt]]

Thanks for the report. I see this on my iPad in portrait, trying to scroll that list down reproduces that constant jump until you lift your finger. Maybe an easy fix? Steph?

Comment 2

[Aaron Train [:aaronmt]]

This bug should have a more descriptive title of the problem too if a minimal test-case can be produced.

Comment 3

[Stephan Leroux [:sleroux]]

I've noticed this behavior on websites where the web content size is near the size of the viewport. I'm investigating another scrolling bug at the moment (https://bugzilla.mozilla.org/show_bug.cgi?id=1165586) which will have some impact on this behavior so I'll keep this in mind when working on that bug in hopes of hitting two birds with one stone :)

Comment 4

[Aaron Train [:aaronmt]]

More STR, google.ca (see privacy banner at top), scroll down, try scrolling up - the page jumps around

There's a similar issue in Safari but not as jarring. I think we should track if this is reproducible on Google's front-page.

Comment 5

[Waldi]

Should I rename the Bugname?
What is the best title?

Comment 6

[Stephan Leroux [:sleroux]]

This is part of this larger issue which I've just attached a patch for: https://bugzilla.mozilla.org/show_bug.cgi?id=1165586. It seems to resolve the support scrolling behavior but Google is still jumpy (but less than it was). Probably around the same amount of jumpiness as Safari is right now.

Comment 8

[Stephan Leroux [:sleroux]]

Tracking as it's fixed as part of https://bugzilla.mozilla.org/show_bug.cgi?id=1165586

Comment 9

[Stephan Leroux [:sleroux]]

Attachment: PR https://github.com/mozilla/firefox-ios/pull/719

I've attached a quick patch that fixes some of the jumpiness of the url bars while scrolling and will follow up with a patch for specific websites like google.com

Comment 10

[Stephan Leroux [:sleroux]]

Merged