Name

Purpose

Expires

ASP.NET_SessionId

Used to maintain anonymous user sessions by the server.

When you close the browser

UMB_UCONTEXT_MEMBER

Stores reference to the currently logged-in user.

30 minutes

__cfduid

Used to detect malicious visitors and minimise blocking legitimate users.

30 days

ai_user

Unique anonymous user identifier cookie for performance monitoring.

1 year

ai_session

Unique session identifier cookie for performance monitoring.

When you close the browser

hp

Used to manage site performance or personalisation.

When you close the browser

UMB_PANEL

Stores the state of Umbraco back-office panels for logged-in editors.

When you close the browser

UMB_PREVIEW

Enables preview mode in Umbraco for logged-in editors.

When you close the browser

UMB_UCONTEXT

Stores Umbraco user context for authenticated users.

30 minutes

UMB_UPDCHK

Checks for Umbraco updates for logged-in editors.

When you close the browser

umbht

Umbraco helper token used to manage interface state.

When you close the browser

umbPanel_pWidtPanel_pHeigh

Stores UI panel dimensions in Umbraco back office.

When you close the browser

UMB-XSRF-TOKEN

Cross-site request forgery protection token for Umbraco back office.

When you close the browser

UMB-XSRF-V

Used with UMB-XSRF-TOKEN to protect against CSRF.

When you close the browser

cache-sprite-plyr

Caches video player assets for faster playback.

1 year

CookieControl

Used to remember the user’s consent preferences.

3 months

HEAffinity

Ensures the user session is routed to the same server instance (load balancing).

When you close the browser

Name

Purpose

Expires

_ga

Checks if you’ve visited our website before. This helps us count how many people visit our site.

2 years

_ga*

Google Analytics 4 variant used to track user interactions across sessions.

2 years

_gid

Checks if you’ve visited our website before. This helps us count how many people visit our site.

24 hours

_gat*

Set by Google Tag Manager to limit the number of requests made to doubleclick.net.

1 minute

_gs

Used to identify the user’s browser, operating system, IP address and the page on the website they are viewing.

1 hour

_gu

Used to distinguish users.

1 year

_gw

Records widgets previously displayed to the user.

1 year

__utma

Used to distinguish users and sessions (legacy Google Analytics).

2 years

__utmt

Used to throttle request rate (legacy Google Analytics).

10 minutes

__utmb

Determines new sessions and visits (legacy Google Analytics).

30 minutes

__utmc

Determines whether the user was in a new session or visit (legacy Google Analytics).

When you close the browser

__utmz

Stores the traffic source or campaign that explains how the user reached the site.

6 months

__utmv

Stores custom variable data at the visitor level (legacy Google Analytics).

2 years

collect

Used to send data to Google Analytics about the visitor’s device and behaviour.

When you close the browser

_hj*

Hotjar analytics cookies used to understand user behaviour and improve user experience.

Up to 1 year

Name

Purpose

Expires

_fbp

Facebook Pixel cookie used to store and track visits across websites for targeted advertising.

3 months

_gcl_au

Google Ads cookie used for conversion tracking and remarketing.

3 months