One important thing to note now that we're over to Chromium 124 base: Partitioned Cookies, aka "Cookies Having Independent Partitioned State" (CHIPS). One of the many experiments related to Google's "phasing out" of third-party cookies and part of the Privacy Sandbox:
https://developer.mozilla.org/en-US/docs/Web/Privacy/Privacy_sandbox/Partitioned_cookies
Mozilla is Positive but it's not implemented in Firefox.
https://mozilla.github.io/standards-positions/#chips
I use Cookie Autodelete, and it looks like CAD is unable to delete cookies with the partitioned state. Not surprising since this is pretty new and CAD has not been updated for a long time. Have not tested with Site Bleacher but I assume the same is the case there.
So for those of you like me who block 3pc and notice strange domains showing up your cookies list, that you have not whitelisted - this is probably the cause.
8c6a4e30-eb4f-4f55-b553-72ad784d3540-image.png
The Partition Key indicates the cookie from creativecdn.com is only allowed to be used when visiting allmusic.com.
No big reason to panic, just want to make sure people know about this before they throw a fit about Vivaldi saving cookies from domains even if you have 3pc blocked.