1875561 - about:mozilla rendering

Status: NEW

(Fenix :: Browser Engine, defect)

Description

[csheany]

Attachment: about:mozilla.jpg

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:123.0) Gecko/20100101 Firefox/123.0

Steps to reproduce:

Open about:mozilla

Actual results:

See the attached screenshot

Expected results:

To be determined

Comment 1

[Daniel Veditz [:dveditz]]

That screenshot is nothing like what I see on Fenix. Looks fine.

Comment 2

[csheany]

Thank you for your response.

May I ask what device you tested with?

This was reproduced on a tablet and I am still able to.

Comment 3

[Daniel Veditz [:dveditz]]

Samsung Galaxy S22, running Android 14. You?

Comment 4

[csheany]

Samsung Galaxy Tab S9+ (Android 14) (Fenix Nightly)

Samsung Galaxy Tab S5e (Android 11) (Reference Browser)

Phones might not be affected.

Comment 5

[Botond Ballo [:botond]]

I've come across bug reports about clipped rendering when viewing certain pages on mobile devices with larger screens in the past, it sounds plausible that there's a bug affecting scenarios where e.g. the screen size is larger than the mobile viewport size.

Comment 6

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:tthibaud, could you have a look please?

For more information, please visit BugBot documentation.

Comment 7

[Titouan Thibaud [:titouan]]

I can't reproduce it on a Samsung Tab A (SM T510).

QA, do we have tablets on which the bug can be reproduced?

Comment 8

[eclaudiu64]

Attachment: Screenshot_20240411-131540_Firefox Beta.jpg

Set the font in the app to 100% and it can reproduce on the phone as well.About:* pages have font and zoom issues. This error also seems related: https://bugzilla.mozilla.org/show_bug.cgi?id=1890064

Comment 9

[Titouan Thibaud [:titouan]]

Thanks for this perfect STR! I can reproduce the bug too when setting the font to 100% in the Accessibility settings.

It does seem related to Bug 1890064.

:Botond, do you think I should transfer this bug to the Panning and Zoom component?

Comment 10

[Lorand Janos]

Hi,
I can confirm it is reproducible as mentioned by eclaudiu64, on phones as well.
Tested on the latest Nightly (126.0a1 from 2024-04-11) as well as latest RC 125.0.
Device used: Samsung Galaxy S23 Ultra (Android 14).

Comment 11

[Botond Ballo [:botond]]

I have not been able to reproduce this on either a phone (tested on Samsung Galaxy A22) or a tablet (Samsung Galaxy Tab A9+).

Lorand and/or eclaudiu64: just to confirm, with the font set to 100%, you see rendering as shown in this attachment, i.e. with the text and brighter background color cut off at a size smaller than the screen size?

Comment 12

[Botond Ballo [:botond]]

(for comment 11)

Comment 13

[Lorand Janos]

Hi, sorry for the late response here, I don't seem to be able to reproduce the issue anymore, on the latest builds with the same device.
However at the time, yes, it was with the font set to 100%, and in my case I'll add my screenshot of how it was displayed for me, checked on a Redmi Pad tablet as well, with the issue still reproducing on RC 125.3.0, 126.0 and Beta 126.0b9 but no longer reproducible on the latest Nightly build 127.0a1.
Devices used: Samsung Galaxy S23 Ultra (Android 14) and Redmi Pad SE (Android 12).
Adding the screenshots from different builds and devices.

Comment 14

[Lorand Janos]

Attachment: Xiaomi_RC125_3_0.jpg

Comment 15

[Lorand Janos]

Attachment: S23Ultra_RC126_0_and_Beta126_0b9.JPEG

Comment 16

[Lorand Janos]

Attachment: Nightly_127_0a1.JPEG

Comment 17

[Botond Ballo [:botond]]

Thanks.

I do think the rendering shown in https://bugzilla.mozilla.org/attachment.cgi?id=9401499 and https://bugzilla.mozilla.org/attachment.cgi?id=9401500 is a distinct issue from the rendering shown in the original report (https://bugzilla.mozilla.org/attachment.cgi?id=9375535). The former just indicates the page content is sized too large and overflows the screen, whereas in the later case there is room to display the whole text but it's clipped for some reason.