The full list,
no buried defaults.

Tells us which user you are so your companions are yours. Without it, the site doesn't work.

Duration

365 days

Opt out

Use the site without an account, or click "forget everything" on /goodbye to clear it.

A flag in localStorage so the welcome card doesn't pop up every visit. Stays on your device.

Duration

Until you clear browser storage

Opt out

Clear it from your browser settings whenever.

Anonymous session replay so we can see where the site confuses people. Email and free-text fields are scrubbed before recording.

Duration

1 year (_clck) / session (_clsk)

Opt out

Use a browser-level tracker blocker (most ad-blockers and privacy-focused browsers stop Clarity automatically), or block clarity.ms in your browser's content settings.

Lets us measure which Meta ads led to which signups so we know which campaigns are working. _fbp is set on every visit; _fbc is only set when you arrive from a Meta ad with a click id.

Duration

90 days

Opt out

Use a tracker-blocking browser extension, or block connect.facebook.net in your browser's content settings. Meta also offers an account-level opt-out at facebook.com/ads/preferences.

Lets us measure which Google Ads led to which signups. Set on every visit when the tag loads; used for conversion attribution and remarketing audiences.

Duration

90 days

Opt out

Use a tracker-blocking browser extension, or block googletagmanager.com in your browser's content settings. Google also offers an account-level opt-out at adssettings.google.com.