WMF deployed extensions that need converting to manifest_version 2 ([[ https://www.mediawiki.org/wiki/Manual:Extension.json/Schema#manifest_version | compatible with 1.29+ ]]):
[x] ActiveAbstract
[x] ApiFeatureUsage
[x] ArticlePlaceholder
[x] Babel
[x] BetaFeatures
[x] Calendar
[x] Campaigns
[x] Capiunto
[x] CategoryTree
[x] CentralNotice
[x] CharInsert
[x] cldr
[x] CodeEditor
[x] CodeMirror
[x] CodeReview
[x] CollaborationKit
[x] CommonsMetadata
[x] ContactPage
[x] ContributionTracking
[x] CreditsSource
[x] Dashiki
[x] Disambiguator
[x] DismissableSiteNotice
[x] DonationInterface
[x] DoubleWiki
[x] DynamicSidebar
[x] Elastica
[x] ElectronPdfService
[x] EventBus
[x] ExtensionDistributor
[x] FeaturedFeeds
[x] FundraiserLandingPage
[x] Gadgets
[x] GeoCrumbs
[x] GettingStarted
[x] GlobalCssJs
[x] GlobalPreferences
[x] GlobalUserPage
[x] GoogleNewsSitemap
[x] Graph
[x] GuidedTour
[x] ImageMap
[x] InputBox
[x] Insider
[x] intersection
[x] Interwiki
[x] Josa
[x] LabeledSectionTransclusion
[x] LandingCheck
[x] Linter
[x] Listings
[x] LocalisationUpdate
[x] MapSources
[x] MassMessage
[x] Math
[x] MobileApp
[x] MobileFrontend
[ ] MultimediaViewer
[x] Newsletter
[x] NewUserMessage
[x] Nuke
[x] PageAssessments
[x] ParserFunctions
[x] ParsoidBatchAPI
[x] PdfHandler
[x] PerformanceInspector
[x] Petition
[x] Poem
[x] PoolCounter
[x] PropertySuggester
[x] QuickSurveys
[x] Quiz
[x] Renameuser
[x] RevisionSlider
[x] RSS
[x] SandboxLink
[x] Score
[x] SearchExtraNS
[x] SecurePoll
[x] ShortUrl
[x] SpamBlacklist
[x] SubpageSortkey
[x] SyntaxHighlight_GeSHi
[x] TemplateData
[x] TemplateSandbox
[x] TextExtracts
[x] Thanks
[x] TitleBlacklist
[x] TocTree
[x] TranslationNotifications
[x] TrustedXFF
[x] UploadsLink
[x] UploadWizard
[x] UrlShortener
[ ] UserMerge
[x] VisualEditor
[x] WikiEditor
[x] wikihiero
[x] WikiLove
[x] WikimediaBadges
[x] WikimediaEvents
[x] WikimediaIncubator
[x] Wikisource
[x] XAnalytics