floc has been blocked by a majority of services (framework such as sveltekit, ....). So Google comes back with a new one.

Topics looks better.

The operation appears simpler than FLoC. First, the browser collects the interests for the week. It stores the information locally for the last three weeks. It is not communicated to any server and is deleted after this period.

When the person visits a site, it can draw from the local pool. Only one interest per week, for a maximum of three. Via Topics, a site would not go any further.