1865320 - Background image doesn't fill the whole page in some edge cases

Status: NEW

(Firefox for Android :: Browser Engine, defect)

Description

[tithen.firion.0]

Attachment: Screenshot_2023-11-17-12-41.jpg

Steps to reproduce:

1. Enable "Scroll to hide toolbar".
2. Open page with a repeating background image, with content approximately the height of the viewport.

Reproduction: https://tithen-firion.github.io/firefox-android-bug-test/
Background image is set to red pixel, background color is set to yellow, content height (empty DIV element) is set to 100vh as an example.

Actual results:

Background image doesn't fill the whole page. You can scroll down to hide the toolbar (doesn't matter if it's on top or bottom) and there's a part of the webpage without the background image.

Expected results:

Background image should fill the whole page.

Comment 1

[Mira Lobontiu (Android QA)]

I confirm this issue on all three versions of firefox for Android: 120.0, Beta 121.0b1, Nightly 122.0a1 from 11/22 with: Google Pixel (Android 10), and Oppo Find N2 Flip (Android 13).