Template:Cookie table

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Name Expires Category What does it do?
centralauth_User 365 days, if the user chooses 'Keep me logged in'. Otherwise 30 days. Functionality Allows you to log in to many of the Wikimedia Projects using a single form, and stay logged in after providing your password.
CentralAuthAnon Either Local Storage, or a 1 day cookie Functionality Allows us to know that you are not currently logged in through our centralized account system.
centralauth_LoggedOut

LoggedOut

1 day from log out time Functionality Ensures recently logged out users do not see outdated cached content
centralauth_Session

{$wgCookiePrefix}Session

When user exits browser Functionality Manage sessions. Provides functionality such as logging in to Wikimedia Projects.
centralauth_Token

{$wgCookiePrefix}Token

365 days, if the user chooses 'Keep me logged in'. Otherwise omitted. Authentication Provides 'Keep me logged in' functionality.
centralnotice_bucket 7 days Performance and Analysis Helps us understand the effectiveness of notices provided to users through the CentralNotice extension. For more details, see https://www.mediawiki.org/wiki/Extension:CentralNotice
{$wgCookiePrefix}UserID, UserName 365 days, if the user chooses 'Keep me logged in'. Otherwise 30 days. Authentication Helps identify you to the wiki, and keeps you logged in.
{$wgCookiePrefix}forceHTTPS 30 days Functionality If you log in as https, and then later visit as http, this will cause you to redirect to https.
centralnotice_fundraising 1 year Functionality Allows us to stop showing banners to people once they’ve donated.
stopMobileRedirect 30 days Preferences Tells us not to redirect to the mobile site if you don't like that.
uls-preferences Local Storage, not a cookie Preferences Allows you to set preferences for the Universal Language Selector functionality.
langMap Local Storage, not a cookie Preferences Sets most highly prioritized languages for the language switcher on the mobile site.
mobile-betaoptin-token Local Storage, not a cookie Preferences Helps us to know on the mobile site if we've previously asked you to enroll in beta, so that we don't prompt you unnecessarily.
WMF-Last-Access 30 days Analytics Helps us calculate Unique devices accessing our site. See: https://blog.wikimedia.org/2016/03/30/unique-devices-dataset/
GeoIP Expires when user exits browser Functionality Helps us show you banners and other notices appropriate to your region, based on information from a GeoIP database
mwe-popups-enabled Local Storage, not a cookie Preferences Helps us to know if you have disabled Hovercards.
ext.popups.core.previewCount Local Storage, not a cookie Performance and Analysis Helps us understand the effectiveness of Hovercards.
hidewatchlistmessage-[watchlistMessageId]
  • where watchlistMessageId is the Id of the message being hidden
28 days Preferences Allows a user to hide a watchlist message.
  • this cookie is on Persian Wikipedia (fa.wikipedia.org)
{$wgCookiePrefix}BlockID up to 24 hours Functionality Helps us enforce autoblocks, a system used to prevent vandalism and disruption
loginnotify_prevlogins 180 days Authentication Verifies that you are logging in from a known device. This affects the threshold for how many unsuccessful login attempts trigger a notification to the user.
userFontSize Local Storage, not a cookie Preferences Keeps track of your preferred font size on the mobile site.
expandedSections Local Storage, not a cookie Preferences Keeps track of sections that are expanded on pages that you've viewed so that we can present a consistent view during your session.
preferredEditor Local Storage, not a cookie Preferences Keeps track of your preferred editor on the mobile site.