2021596 - edge to edge wallpaper causes color-flicker in system status-bar, and mismatched top/bottom bar colors, when editing the URL of an open tab

Status: RESOLVED FIXED

(Firefox for Android :: Homepage, defect)

Description

[Daniel Holbert [:dholbert]]

Steps to reproduce

1. Set your phone to dark mode (optional, this just makes the colors a bit more distinctive & the bug easier to see)
2. Open Firefox Nightly, & notice that the new-tab homepage is blue from the (now-default) Edge to Edge Wallpaper
3. Visit some website -- e.g. tap Firefox's shortcut tile for Wikipedia.
4. In your Wikipedia tab, tap the address bar (to go into edit-the-URL mode)
5. Tap the down-arrow at the bottom left corner of the keyboard.

Expected behavior

Consistent theme across the screen, and no odd flickering.

Actual behavior

After step 4 (when you tap the address bar), the system status-bar (at the top of the screen) and navbar (bottom of the screen) flicker from gray to blue to gray again.
After step 5, when the (gray) keyboard gets dismissed, it reveals a blue navbar at the bottom of the screen. (This stands out as wrong since this navbar was gray when you were viewing Wikipedia, and the rest of the screen [including the status bar] is gray-themed at this point.)

Device information

• Firefox version: Nightly 150.0a1 (2026-03-05)
• Android device model: Pixel 6a, Pixel 10 Pro XL
• Android OS version: 16

Comment 1

[Daniel Holbert [:dholbert]]

Attachment: screencast of bug

Comment 2

[Daniel Holbert [:dholbert]]

Attachment: screenshot of the moment that the status bar and navbar flicker blue

(In reply to Daniel Holbert [:dholbert] from comment #0)

After step 4 (when you tap the address bar), the system status-bar (at the top of the screen) and navbar (bottom of the screen) flicker from gray to blue to gray again.

Here's a screenshot from my screencast, showing the moment that the top/bototm-bars flicker to blue.

(Just before and after this moment, the top/bottom bars are gray; they only appear blue for a brief moment.)

Comment 3

[Daniel Holbert [:dholbert]]

Attachment: screenshot showing navbar being the only blue-themed thing after keyboard is collapsed

(In reply to Daniel Holbert [:dholbert] from comment #0)

After step 5, when the (gray) keyboard gets dismissed, it reveals a blue navbar at the bottom of the screen. (This stands out as wrong since this navbar was gray when you were viewing Wikipedia, and the rest of the screen [including the status bar] is gray-themed at this point.)

Here's a screenshot from my screencast, showing this^ part of the actual-results.

Comment 4

[Daniel Holbert [:dholbert]]

(Marking 149 and 150 as affected since I think this will be a user-facing issue by default in those releases, since that's where this wallpaper became the default in bug 2014189.)

Comment 5

[Daniel Holbert [:dholbert]]

(In reply to Daniel Holbert [:dholbert] from comment #4)

(Marking 149 and 150 as affected [...] where this wallpaper became the default in bug 2014189.)

(my mistake; 149 is actually unaffected [for now at least] since the specific patch that changed the default didn't make it into 149, per bug 2014189 comment 8.)

Comment 6

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

:dholbert, since this bug is a regression, could you fill (if possible) the regressed_by field?
For more information, please visit BugBot documentation.

Comment 7

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

:titouan, since you are the author of the regressor, bug 2014189, could you take a look?

For more information, please visit BugBot documentation.

Comment 8

[Titouan Thibaud [:titouan]]

I won't be able to have this fixed before the Beta cut. I'll do my best to fix that soon.

Comment 9

[Jonathan Almeida [:jonalmeida]]

Hey Titouan, any updates?

Comment 10

[Daniel Holbert [:dholbert]]

(redirecting ni for comment 9)

Comment 11

[Titouan Thibaud [:titouan]]

Attachment: Bug 2021596 - Fix statusbar color-flicker issues with Edge2Edge background.

Comment 12

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/1dcc40adeb2c
https://hg.mozilla.org/integration/autoland/rev/c24c8cbd4863
Fix statusbar color-flicker issues with Edge2Edge background. r=android-reviewers,jdelorenzo,devota

Comment 13

[rperta]

https://hg.mozilla.org/mozilla-central/rev/c24c8cbd4863

Comment 14

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

The patch landed in nightly and beta is affected.
:titouan, is this bug important enough to require an uplift?

• If yes, please nominate the patch for beta approval.
  • See https://wiki.mozilla.org/Release_Management/Requesting_an_Uplift for documentation on how to request an uplift.
• If no, please set status-firefox150 to wontfix.

For more information, please visit BugBot documentation.

Comment 15

[Titouan Thibaud [:titouan]]

I'll request uplift to release as soon as I have QA review.

Comment 16

[Mira Lobontiu (Android QA)]

Attachment: Screenshot_20260422-153108.png

I am still able to reproduce the issue on the Firefox for Android nightly 152.0a1 from 4/22 using a Pixel 6 (Android 17), and Samsung Galaxy Z Fold4 (Android 16).
Titouan, could you take a look?

Comment 17

[Titouan Thibaud [:titouan]]

Thanks Mira! I opened Bug 2035433 to track this in a different bug, as this one was also about the statusbar background.

Comment 18

[Ryan VanderMeulen [:RyanVM]]

Is this ready for a Release uplift request?

Comment 19

[Titouan Thibaud [:titouan]]

Sorry, I forgot to file the uplift request. Thanks for the reminder Ryan!

Comment 20

[Phabricator Automation]

firefox-release Uplift Approval Request

• User impact if declined/Reason for urgency: Statusbar flickering when user enabled Edge2Edge background
• Code covered by automated testing?: no
• Fix verified in Nightly?: yes
• Needs manual QE testing?: no
• Steps to reproduce for manual QE testing:
• Risk associated with taking this patch: low
• Explanation of risk level: The changes were validated by QA and the patch has been backing in Nightly for 2 weeks.
• String changes made/needed?: No
• Is Android affected?: yes

Comment 21

[Titouan Thibaud [:titouan]]

Attachment: Bug 2021596 - Fix statusbar color-flicker issues with Edge2Edge background.

Original Revision: https://phabricator.services.mozilla.com/D292743

Comment 22

[Pulsebot]

https://github.com/mozilla-firefox/firefox/commit/38f822f08928
https://hg.mozilla.org/releases/mozilla-release/rev/4c5dc1cc7101