Squeeze out more of the static image files of Baby Globe without visible quality loss
Closed, ResolvedPublic1 Estimated Story Points
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	Volker_E
	Feb 12 2026, 6:12 PM

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Description

Background

There are specific compression ways to reduce metadata and file format inherit data structures that will help us to sqeeze the last bit out of the static images without visible quality loss.

Goal

Ensure smallest possible size without visible quality loss to ensure best possible client performance.

Acceptance criteria for done

Compress all static images without visible quality loss again

QA steps

Ensure that the static fallback images look fine in older browsers which were the first with WebP support

Details

Related Changes in Gerrit:

	Subject	Author	Repo	Branch	Lines +/-
	resources: Squeeze static images more without visible quality loss	Jdrewniak	mediawiki/extensions/WP25EasterEggs	wmf/1.46.0-wmf.15	+0 -0
	resources: Squeeze static images more without visible quality loss	VolkerE	mediawiki/extensions/WP25EasterEggs	master	+0 -0

Customize query in gerrit

Related Objects

Mentioned In: T416218: Provide a way to test the Easter Egg CommunityConfig before launching
Mentioned Here: T415722: [QA task] Testing WP25EasterEggs extension
T416218: Provide a way to test the Easter Egg CommunityConfig before launching

Event Timeline

Volker_E created this task.Feb 12 2026, 6:12 PM

Restricted Application added a subscriber: Aklapper. · View Herald TranscriptFeb 12 2026, 6:12 PM

Change #1239192 had a related patch set uploaded (by VolkerE; author: VolkerE):

[mediawiki/extensions/WP25EasterEggs@master] resources: Squeeze static images more without visible quality loss

https://gerrit.wikimedia.org/r/1239192

gerritbot added a project: Patch-For-Review.Feb 12 2026, 6:22 PM

Change #1239192 merged by jenkins-bot:

[mediawiki/extensions/WP25EasterEggs@master] resources: Squeeze static images more without visible quality loss

https://gerrit.wikimedia.org/r/1239192

ReleaseTaggerBot added a project: MW-1.46-notes (1.46.0-wmf.16; 2026-02-17).Feb 12 2026, 7:00 PM

Maintenance_bot removed a project: Patch-For-Review.Feb 12 2026, 7:31 PM

Change #1239256 had a related patch set uploaded (by Jdrewniak; author: VolkerE):

[mediawiki/extensions/WP25EasterEggs@wmf/1.46.0-wmf.15] resources: Squeeze static images more without visible quality loss

https://gerrit.wikimedia.org/r/1239256

gerritbot added a project: Patch-For-Review.Feb 12 2026, 10:00 PM

Change #1239256 merged by jenkins-bot:

[mediawiki/extensions/WP25EasterEggs@wmf/1.46.0-wmf.15] resources: Squeeze static images more without visible quality loss

https://gerrit.wikimedia.org/r/1239256

Mentioned in SAL (#wikimedia-operations) [2026-02-12T22:12:05Z] <jdrewniak@deploy2002> Started scap sync-world: Backport for [[gerrit:1239255|Allow enabling extension via query parameter for testing (T416218)]], [[gerrit:1239256|resources: Squeeze static images more without visible quality loss (T417307)]]

Mentioned in SAL (#wikimedia-operations) [2026-02-12T22:14:04Z] <jdrewniak@deploy2002> jdrewniak: Backport for [[gerrit:1239255|Allow enabling extension via query parameter for testing (T416218)]], [[gerrit:1239256|resources: Squeeze static images more without visible quality loss (T417307)]] synced to the testservers (see https://wikitech.wikimedia.org/wiki/Mwdebug). Changes can now be verified there.

Mentioned in SAL (#wikimedia-operations) [2026-02-12T22:19:49Z] <jdrewniak@deploy2002> Finished scap sync-world: Backport for [[gerrit:1239255|Allow enabling extension via query parameter for testing (T416218)]], [[gerrit:1239256|resources: Squeeze static images more without visible quality loss (T417307)]] (duration: 07m 44s)

Maintenance_bot removed a project: Patch-For-Review.Feb 12 2026, 10:31 PM

ReleaseTaggerBot edited projects, added: MW-1.46-notes (1.46.0-wmf.15; 2026-02-10); removed: MW-1.46-notes (1.46.0-wmf.16; 2026-02-17).Feb 12 2026, 11:00 PM

Volker_E triaged this task as High priority.Feb 13 2026, 3:37 PM

Volker_E added a project: Reader Experience Team (REx Sprint 14 [Q3 Feb 10 - 23]).

Volker_E updated the task description. (Show Details)

Volker_E set the point value for this task to 1.

Volker_E moved this task from Ready to Needs QA on the Reader Experience Team (REx Sprint 14 [Q3 Feb 10 - 23]) board.

Volker_E updated the task description. (Show Details)

Checked - no issues found.

Testing notes:

WebP browser support started with quite old versions of major browsers (https://developers.google.com/speed/webp/faq), e.g. Firefox 65.

(1) Checked on older browser versions
Firefox 65/64 - looks ok
Chrome 108 - looks ok
Safari 17- ok

(2) some very old versions of browser do not even display the appearance menu

(3) The official full support is provided for the last three versions of major browsers (more results in in cross-browsers test results in T415722: [QA task] Testing WP25EasterEggs extension)

Chrome 145, 144, 143
Firefox 147, 146, 145
Safari 26, 18, 17

Resolving as support for very old browsers is out of scope. Thank you Elena!

Squeeze out more of the static image files of Baby Globe without visible quality lossClosed, ResolvedPublic1 Estimated Story PointsActions