Use of cookies
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Written by Disqus
Updated over a week ago

To post comments and have your Disqus login information remembered across pages, cookies – specifically, first party (and in some browsers, third-party) cookies – must be enabled.

Third party cookies

Disqus doesn't require third party cookies to be enabled for basic functionality (like posting), but they are required to keep you logged in between pages in some browsers. If you're using Safari or a new version of Firefox, you won't need to enable third-party cookies to stay logged in because those browsers consider our cookies to be "first-party" because they're used in a trusted way.

If you're using a browser other than Safari or Firefox and you'd rather disable third-party cookies for all sites, but you'd still like Disqus to remember that you're logged in, simply add an exception for and its subdomains to your cookie settings. Instructions on how to do that are noted underneath each browser below.

Single Sign-on

Disqus doesn't store an authentication cookie when signing in with Single Sign-on (website-specific profiles). The site is required to pass the user authentication each time the user loads the comments.

Cookies we set

These are the cookies we may set for someone visiting a site with Disqus embedded on it. This list is for sites complying with the EU cookie law.

External cookies

  • __qca (Domain:

  • mc (Domain:

Google Analytics

  • UID (Domain:

  • UIDR (Domain:

Internal cookies

  • disqus_unique (Domain:
    ​ Internal statistics, used for anonymous visitors (Sigma)

  • testCookie (Domain:
    ​ Used to check whether the browser accepts 3rd-party cookies.

How to enable cookies

If you can't comment, or aren't able to stay logged in, check your cookie settings using the instructions for your browser below.

Internet Explorer

  1. Click Tools in the upper right hand area of your browser

  2. Find and click Internet Options

  3. Go to the Privacy tab and click Advanced

  4. Check Override automatic cookie handling (if it isn't already)

  5. Make sure First-party Cookies are set to Accept

  6. Set Third-party cookies to Accept

If third party cookies are blocked:

  1. Under the Privacy tab click the Sites button

  2. Type and click Allow


  1. Click the Chrome Menu Icon -> Settings

  2. Near the bottom of the page, click Show advanced settings

  3. In the "Privacy" section, click Content settings

  4. In the "Cookies" section, choose Allow local data to be set (recommended)

  5. Make sure "Block all third-party cookies..." and "Clear cookies..." are unchecked

If third party cookies are blocked:

  1. Under Content settings click Manage Exceptions...

  2. Type [*.] as a hostname pattern and set to Allow


  1. Windows: Go to Tools -> Options
    Mac: Go to Firefox -> Preferences

  2. Click the Privacy tab

  3. Under History, select Use custom settings for history

  4. Check both Accept cookies from sites and Accept third-party cookies

If third party cookies are blocked:

  1. Under the Privacy tab click Exceptions

  2. Type and then click Allow


  1. Windows: Go to Edit -> Preferences
    Mac: Go to Safari -> Preferences

  2. Click the Security tab

  3. Under Block Cookies, select From third parties or advertisers or Never

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