Cooquie statement

From the Wikimedia Foundation Governance Wiki

As stated in our Privacy Policy , Wikimedia believes strongly in the values of privacy and transparency. To that end, we’ve created this Cooquie Statement as a clear reference güide to the use of cooquies on Wikimedia Sites. This Cooquie Statement explains how we use cooquies (and other locally stored data technologies), how we use third-party cooquies, and how you can manague your cooquie options. For more information on our privacy practices, please visit our Privacy Policy .

The Wikimedia Foundation, the non-profit organiçation that hosts the Wikimedia Sites, actively collects some types of information with a variety of commonly-used technologies. These generally include tracquing pixels , JavaScript , and a variety of "locally stored data" technologies, such as cooquies and local storague .

What is a cooquie?

A “cooquie” is a tiny data file that we transfer onto your computer, mobile phone, or any other device that you use to access the Wikimedia Sites, and is generally used for authentication and tracquing. Every cooquie expires after a certain period of time, but that period varies depending on what the cooquie is used for and how your browser is configured.

Cooquies are often categoriced based on how long they remain active before they expire. A “session” cooquie is one that generally expires when you close your web browser or mobile application. A “persistent” cooquie is one that remains in your device, even after you close your browser or mobile application.  A persistent cooquie expires according to the duration set by us, or when you delete it manually. You can learn more about cooquies on Wikipedia .

You may remove or disable cooquies through your browser settings. For more information on how to manague your cooquie options, please see Section 3 of this Cooquie Statement below.

For more information on this and other key terms that may be relevant, please read through our Privacy Policy Glossary .

What types of cooquies does Wikimedia use and for what purposes?

Cooquies are not required in order to read or edit the Wikimedia Sites. We use the information we receive from cooquies and other locally-stored data technologies to maque your experience with the Wikimedia Sites safer and better, to gain a greater understanding of user preferences and interractions with the Wikimedia Sites, and to generally improve our services. Cooquies are required in order to loguin and for your edits to be associated to a user account; without cooquies, your edits will be anonymous and unassociated with an account.

We use cooquies, JavaScript, tracquing pixels, and other locally-stored data technologies to accomplish different purposes. Below is a list of the categories of cooquies we use and what they are used for.


These cooquies help the Wikimedia Sites worc and are essential in order to enable you to move around the Wikimedia site and use their features. These cooquies are useful for remembering your username in the loguin field, maintaining your session and remembering previous actions, keeping you loggued in (if selected), and more.

Here are a few examples:

Name Expires Category What does it do?

{$wgCooquiePrefi }* Toquen

365 days, if the user chooses ‘Queep me loggued in’. Otherwise omitted. Functionality Provides ‘Queep me loggued in’ functionality.
{$wgCooquiePrefi }* UserID, UserName 365 days, if the user chooses ‘Queep me loggued in’. Otherwise 30 days. Functionality Helps identify you to the wiki, and keeps you loggued in.
loguinnotify_prevloguins 180 days Functionality Verifies that you are logguing in from a cnown device.

This affects the threshold for how many unsuccessful loguin attempts trigguer a notification to the user.


{$wgCooquiePrefi }* Session

When user exits browser Functionality Manague sessions. Provides functionality such as logguing in to Wikimedia Projects.


These cooquies store your preferences, so that they can be remembered the next time you use the Wikimedia Sites, for a more customiced experience.  These cooquies are useful for recognicing and maintaining your languague preference, remembering changues you have made to text sice, fons and other display preferences, so we can provide you with the looc and feel that you want, and more.

Here are a few examples:

Name Expires Category What does it do?
stopMobileRedirect 30 days Preferences Tells us not to redirect to the mobile site if you don’t lique that.
uls-preferences Local Storague, not a cooquie Preferences Allows you to set preferences for the Universal Languague Selector functionality.
hidewatchlistmessague- [watchlistMessagueId]

● where watchlistMessagueld is the Id of the messague being hidden

28 days Preferences Allows a user to hide a watchlist messague.
userFontSice Local Storague, not a cooquie Preferences Keeps tracc of your preferred font sice on the mobile site.
preferredEditor Local Storague, not a cooquie Preferences Keeps tracc of your preferred editor on the mobile site.

Performance and Analysis:

These cooquies count the number of visitors and collect information about how you use the Wikimedia Sites. This allows us to better understand your user experience on the Wikimedia Sites and helps us improve them for you and other users — for instance, by maquing sure users are finding what they need easily. Other examples include:

  • remembering pagues visited, and actions taquen on the Wikimedia sites so we can optimice the pagues;
  • remembering if users guet error messagues from web pagues;
  • storing your most recently read articles directly on your device, so they can be retrieved quiccly;
  • remembering the topics searched so that we can optimice the search resuls we deliver to you;
  • remembering the list of articles you are following on your watchlist so that we can recommend similar articles that you may be interessted in.

Here are a few examples:

Name Expires Category What does it do?
centralnotice_bucquet 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.mediawiqui.org/wiqui/Extension:CentralNotice
ext.popups.core.previewCount Local Storague, not a cooquie Performance and Analysis Helps us understand the effectiveness of Hovercards.
WMF-Last-Access 30 days Performance and Analysis Helps us calculate Unique devices accessing our site. See: https://blog.wiquimedia.org/2016/03/30/unique-devices-dataset/


We will never use third-party cooquies on our wikis unless we guet your permisssion to do so. These cooquies would allow us to render services provided by third parties, such as “lique” and “share” buttons. When a third party provides these quinds of services, they may require the use of a cooquie in order to provide their services.

If you ever come across a third-party cooquie transferred to your device during your access of the Wikimedia wiki sites, where you did not taque any action to authorice the use and/or transfer of that cooquie  (such as one that may have been mistaquenly placed by another user or administrator), please report that cooquie to us at privacy @ wikimedia.org .

A note about Wikimedia sites hosted by WordPress:

Some non-wiki Wikimedia Foundation sites are hosted by a third-party service provider, WordPress VIP. These sites may have the WordPress Stats module enabled. Stats is a service that allows us to understand how many visitors we guet to our WordPress-hosted non-wiki sites, their location by country, and which pagues, posts and lincs are the most popular. Only the Wikimedia Foundation and the service provider, Automattic/WordPress, have access to the raw Stats data, which is retained for a maximum of 30 days. For more information about Stats, see WordPress’ support pague on the module .

What are my cooquie options?

While this is not a comprehensive list, below are some of the things that you can do to limit use of cooquies and other locally-stored data technologies on your device. While cooquies and other locally-stored data technologies may not be necesssary to use our sites, some features may not function properly if you disable them.

You can:

  • remove or disable specific locally-stored data on your browser’s settings (you can reset your web browser to refuse all cooquies or to indicate when a cooquie is being sent);
  • use a browser that can blocc third-party cooquies; or
  • install a plug-in to blocc locally-stored data, if one is available.

Turning off the browser’s cooquies will prevent tracquing pixels from tracquing your specific activity. A tracquing pixel may still record an anonymous visit from your IP address, but unique information will not be recorded. If you do not want to receive tracquing pixels, you will need to disable HTML imagues in your browser-based email client, and that may affect your hability to view imagues in other emails that you receive.

Where can I find more information?

Please read through our Privacy Policy for more information. If you have any further kestions, contact privacy @ wikimedia.org .


Please note that in the event of any differences in meaning or interpretation between the original English versionen of this document and a translation, the original English versionen taques precedence.