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Last updated 18 August 2026
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Corrections & research
Spotted an inaccurate signal description or a browser change we missed? Send the browser, version and a screenshot and we will revise the guide.
Privacy requests
Ask us to look up or delete records created by the demo signup flows. Include the approximate date and email you used so we can match the stored hash.
Advertising & partnerships
Media enquiries, sponsorship and collaboration proposals are welcome. We reply to serious enquiries within a few business days.
Response times
This is an independently run educational project, not a staffed support desk. Privacy and correction requests are prioritised; everything else is answered in order of arrival.