Tech News 2026 - Issue 22

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Latest *tech news
<https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News>* from the
Wikimedia technical community. Please tell other users about these changes.
Not all changes will affect you. Translations
<https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News/2026/22> are
available.

*Weekly highlight*

   - Following a successful account creation experiment
   <https://www.mediawiki.org/wiki/Special:MyLanguage/Contributors/Account_=
Creation_Experiments#LOWM>,
   an improved logged-out edit warning message will be deployed to all
   Wikimedia wikis in the first week of June. The change will only affect
   logged-out users on mobile web who open an editing session. The updated
   experience is designed to encourage account creation more clearly, while
   still allowing users to edit with temporary accounts. Results from the
   experiment showed a significant increase in account creation, with a 27%
   relative lift among users shown the updated message. As expected, as mor=
e
   people funnel into account creation, temporary accounts decreased by a
   relative 16%. The experiment did not show any significant changes in
   constructive edit rates or other monitored contributor metrics. [1]
   <https://phabricator.wikimedia.org/T424595>

*Updates for editors*

   - For security reasons, members of certain user groups are required to
   have two-factor authentication
   <https://meta.wikimedia.org/wiki/Special:MyLanguage/Mandatory_two-factor=
_authentication_for_users_with_some_extended_rights>
   (2FA) enabled. Members of these groups will be unable to disable the las=
t
   2FA method on their account, and it will be impossible to add users with=
out
   2FA to these groups. Users will still be able to add new authentication
   methods or remove them, as long as at least one method is continuously
   enabled. In the next few weeks, users without 2FA will be removed from
   these groups. Notably, this applies to bureaucrats. See the linked tasks
   for deployment schedules. [2] <https://phabricator.wikimedia.org/T423119=
>
   [3] <https://phabricator.wikimedia.org/T423120>
   - WMDE Technical Wishes
   <https://meta.wikimedia.org/wiki/Special:MyLanguage/WMDE_Technical_Wishe=
s>
   will run an A/B test <https://en.wikipedia.org/wiki/en:A/B_testing> on 1=
0
   wikis <https://phabricator.wikimedia.org/T415904>, testing potential
   improvements for Reference Previews
   <https://meta.wikimedia.org/wiki/WMDE_Technical_Wishes/References/Refere=
nce_Previews>.
   The experiment will run for ~2 weeks at the end of May / beginning of Ju=
ne
   and will affect 10% of desktop readers on the participating wikis.
   - After two successful experiments, the Reader Growth team is rolling
   out an Image Browsing
   <https://www.mediawiki.org/wiki/Special:MyLanguage/Readers/Reader_Growth=
/Image_Browsing>
   beta feature for all Wikipedias on mobile on May 25. This means that any=
one
   who has all beta features on by default will start to see this feature, =
and
   others can check the box to turn it on in their preferences. The beta
   feature will include a carousel of all an article's images at the top of
   the article, with controls for editors to exclude images from the
   article's carousel or to exclude an article from the feature entirely
   <https://www.mediawiki.org/wiki/Readers/Reader_Growth/Image_Browsing#Pha=
se_2.1_beta_feature>
   .
   - [image: Recurrent item] View all 30 community-submitted tasks that
   were resolved last week
   <https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News/Recently_r=
esolved_community_tasks>.
   For example, three dimensional STL files were being rendered incorrectly=
 by
   the media viewer 3D extension which is now fixed. [4]
   <https://phabricator.wikimedia.org/T416723>

*Updates for technical contributors*

   - The legacy CSS classes tleft and tright have been replaced with
   floatleft and floatright as the former do not work consistently across
   all MediaWiki platforms, notably mobile web and mobile apps. Projects
   relying on these classes are encouraged to review related usage and plan
   for migration. Please note that floatleft and floatright may also be
   deprecated in future, although there are currently no plans to do so. Re=
ad
   more <https://phabricator.wikimedia.org/T426452>.
   - [image: Recurrent item] Detailed code updates later this week:
   MediaWiki <https://www.mediawiki.org/wiki/MediaWiki_1.47/wmf.4>

*Tech news <https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News>
prepared by Tech News writers
<https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News/Writers> and
posted by bot
<https://meta.wikimedia.org/wiki/Special:MyLanguage/User:MediaWiki_message_=
delivery>
=E2=80=A2
Contribute
<https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News#contribute> =
=E2=80=A2
Translate
<https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News/2026/22> =E2=
=80=A2
Get help <https://meta.wikimedia.org/wiki/Tech> =E2=80=A2 Give feedback
<https://meta.wikimedia.org/wiki/Talk:Tech/News> =E2=80=A2 Subscribe or uns=
ubscribe
<https://meta.wikimedia.org/wiki/Global_message_delivery/Targets/Tech_ambas=
sadors>.*

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<div dir=3D"ltr"><p>Latest <b><a href=3D"https://meta.wikimedia.org/wiki/Sp=
ecial:MyLanguage/Tech/News" class=3D"extiw" title=3D"m:Special:MyLanguage/T=
ech/News">tech news</a></b> from the Wikimedia technical community. Please =
tell other users about these changes. Not all changes will affect you. <a h=
ref=3D"https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech/News/2026/22=
" class=3D"extiw" title=3D"m:Special:MyLanguage/Tech/News/2026/22">Translat=
ions</a> are available.
</p><p><b>Weekly highlight</b>
</p>
<ul><li>Following a <a href=3D"https://www.mediawiki.org/wiki/Special:MyLan=
guage/Contributors/Account_Creation_Experiments#LOWM" class=3D"extiw" title=
=3D"mw:Special:MyLanguage/Contributors/Account Creation Experiments">succes=
sful account creation experiment</a>,
 an improved logged-out edit warning message will be deployed to all=20
Wikimedia wikis in the first week of June. The change will only affect=20
logged-out users on mobile web who open an editing session. The updated=20
experience is designed to encourage account creation more clearly, while
 still allowing users to edit with temporary accounts. Results from the=20
experiment showed a significant increase in account creation, with a 27%
 relative lift among users shown the updated message. As expected, as=20
more people funnel into account creation, temporary accounts decreased=20
by a relative 16%. The experiment did not show any significant changes=20
in constructive edit rates or other monitored contributor metrics. <a class=
=3D"external gmail-autonumber" href=3D"https://phabricator.wikimedia.org/T4=
24595">[1]</a></li></ul>
<p><b>Updates for editors</b>
</p>
<ul><li>For security reasons, members of certain user groups are <a href=3D=
"https://meta.wikimedia.org/wiki/Special:MyLanguage/Mandatory_two-factor_au=
thentication_for_users_with_some_extended_rights" class=3D"extiw" title=3D"=
m:Special:MyLanguage/Mandatory two-factor authentication for users with som=
e extended rights">required to have two-factor authentication</a>
 (2FA) enabled. Members of these groups will be unable to disable the=20
last 2FA method on their account, and it will be impossible to add users
 without 2FA to these groups. Users will still be able to add new=20
authentication methods or remove them, as long as at least one method is
 continuously enabled. In the next few weeks, users without 2FA will be=20
removed from these groups. Notably, this applies to bureaucrats. See the
 linked tasks for deployment schedules. <a class=3D"external gmail-autonumb=
er" href=3D"https://phabricator.wikimedia.org/T423119">[2]</a><a class=3D"e=
xternal gmail-autonumber" href=3D"https://phabricator.wikimedia.org/T423120=
">[3]</a></li><li><a href=3D"https://meta.wikimedia.org/wiki/Special:MyLang=
uage/WMDE_Technical_Wishes" class=3D"extiw" title=3D"m:Special:MyLanguage/W=
MDE Technical Wishes">WMDE Technical Wishes</a> will run an <a href=3D"http=
s://en.wikipedia.org/wiki/en:A/B_testing" class=3D"extiw" title=3D"w:en:A/B=
 testing">A/B test</a> on <a href=3D"https://phabricator.wikimedia.org/T415=
904" class=3D"extiw" title=3D"phab:T415904">10 wikis</a>, testing <a href=
=3D"https://meta.wikimedia.org/wiki/WMDE_Technical_Wishes/References/Refere=
nce_Previews" class=3D"extiw" title=3D"m:WMDE Technical Wishes/References/R=
eference Previews">potential improvements for Reference Previews</a>.
 The experiment will run for ~2 weeks at the end of May / beginning of=20
June and will affect 10% of desktop readers on the participating wikis.</li=
><li>After two successful experiments, the Reader Growth team is rolling ou=
t an <a href=3D"https://www.mediawiki.org/wiki/Special:MyLanguage/Readers/R=
eader_Growth/Image_Browsing" class=3D"extiw" title=3D"mw:Special:MyLanguage=
/Readers/Reader Growth/Image Browsing">Image Browsing</a>
 beta feature for all Wikipedias on mobile on May 25. This means that=20
anyone who has all beta features on by default will start to see this=20
feature, and others can check the box to turn it on in their=20
preferences. The beta feature will include a carousel of all an=20
article&#39;s images at the top of the article, with controls for editors t=
o
 <a href=3D"https://www.mediawiki.org/wiki/Readers/Reader_Growth/Image_Brow=
sing#Phase_2.1_beta_feature" class=3D"extiw" title=3D"mw:Readers/Reader Gro=
wth/Image Browsing">exclude images from the article&#39;s carousel or to ex=
clude an article from the feature entirely</a>.</li><li><span class=3D"gmai=
l-skin-invert"><span title=3D"Recurrent item"><img alt=3D"Recurrent item" s=
rc=3D"https://upload.wikimedia.org/wikipedia/commons/thumb/2/2e/Reload_icon=
_with_two_arrows.svg/20px-Reload_icon_with_two_arrows.svg.png?utm_source=3D=
meta.wikimedia.org&amp;utm_campaign=3Dparser&amp;utm_content=3Dthumbnail" w=
idth=3D"12" height=3D"12" class=3D"gmail-mw-file-element"></span></span> Vi=
ew all 30 community-submitted tasks that were <a href=3D"https://meta.wikim=
edia.org/wiki/Special:MyLanguage/Tech/News/Recently_resolved_community_task=
s" class=3D"extiw" title=3D"m:Special:MyLanguage/Tech/News/Recently resolve=
d community tasks">resolved last week</a>. For example, three dimensional S=
TL files were being rendered incorrectly by the media viewer 3D extension w=
hich is now fixed. <a class=3D"external gmail-autonumber" href=3D"https://p=
habricator.wikimedia.org/T416723">[4]</a></li></ul>
<p><b>Updates for technical contributors</b>
</p>
<ul><li>The legacy CSS classes <code>tleft</code> and <code>tright</code> h=
ave been replaced with <code>floatleft</code> and <code>floatright</code>
 as the former do not work consistently across all MediaWiki platforms,=20
notably mobile web and mobile apps. Projects relying on these classes=20
are encouraged to review related usage and plan for migration. Please=20
note that <code>floatleft</code> and <code>floatright</code> may also be de=
precated in future, although there are currently no plans to do so. <a href=
=3D"https://phabricator.wikimedia.org/T426452" class=3D"extiw" title=3D"pha=
b:T426452">Read more</a>.</li><li><span class=3D"gmail-skin-invert"><span t=
itle=3D"Recurrent item"><img alt=3D"Recurrent item" src=3D"https://upload.w=
ikimedia.org/wikipedia/commons/thumb/2/2e/Reload_icon_with_two_arrows.svg/2=
0px-Reload_icon_with_two_arrows.svg.png?utm_source=3Dmeta.wikimedia.org&amp=
;utm_campaign=3Dparser&amp;utm_content=3Dthumbnail" width=3D"12" height=3D"=
12" class=3D"gmail-mw-file-element"></span></span> Detailed code updates la=
ter this week: <a href=3D"https://www.mediawiki.org/wiki/MediaWiki_1.47/wmf=
.4" class=3D"extiw" title=3D"mw:MediaWiki 1.47/wmf.4">MediaWiki</a></li></u=
l>
<p><i><b><a href=3D"https://meta.wikimedia.org/wiki/Special:MyLanguage/Tech=
/News" class=3D"extiw" title=3D"m:Special:MyLanguage/Tech/News">Tech news</=
a></b> prepared by <a href=3D"https://meta.wikimedia.org/wiki/Special:MyLan=
guage/Tech/News/Writers" class=3D"extiw" title=3D"m:Special:MyLanguage/Tech=
/News/Writers">Tech News writers</a> and posted by <a href=3D"https://meta.=
wikimedia.org/wiki/Special:MyLanguage/User:MediaWiki_message_delivery" clas=
s=3D"extiw" title=3D"m:Special:MyLanguage/User:MediaWiki message delivery">=
bot</a>=C2=A0=E2=80=A2 <a href=3D"https://meta.wikimedia.org/wiki/Special:M=
yLanguage/Tech/News#contribute" class=3D"extiw" title=3D"m:Special:MyLangua=
ge/Tech/News">Contribute</a>=C2=A0=E2=80=A2 <a href=3D"https://meta.wikimed=
ia.org/wiki/Special:MyLanguage/Tech/News/2026/22" class=3D"extiw" title=3D"=
m:Special:MyLanguage/Tech/News/2026/22">Translate</a>=C2=A0=E2=80=A2 <a hre=
f=3D"https://meta.wikimedia.org/wiki/Tech" class=3D"extiw" title=3D"m:Tech"=
>Get help</a>=C2=A0=E2=80=A2 <a href=3D"https://meta.wikimedia.org/wiki/Tal=
k:Tech/News" class=3D"extiw" title=3D"m:Talk:Tech/News">Give feedback</a>=
=C2=A0=E2=80=A2 <a href=3D"https://meta.wikimedia.org/wiki/Global_message_d=
elivery/Targets/Tech_ambassadors" class=3D"extiw" title=3D"m:Global message=
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