[halftheopposite]

Very shameless plug on your last "Edit:", but I think it fits perfectly one feature that a web extension I made does: https://webcursors.click/.

There's a feature to write a note and leave it on the page for others (with the extension installed) to see and maybe have luck someone contacting you.

[TheFreim]

The design on your site reminds me of kinopio.club, I like the sort of whimsical style that doesn't compromise on utility.

> There's a feature to write a note and leave it on the page for others

Your site says that "nothing is stored." Does writing a note require everyone to be on the site at the same time? At first I thought it was sort of like the old "Dissenter" extension that added comments sections to every page, but the description seems to indicate a more live chat style.