peter.schaefer

I would certainly think so 🙂 

ips4_oauth_authorize - session cookie (expires when tab closed or browser quit) ips4_clearAutosave - session cookie (expires when tab closed or browser quit) ips4_lastSearch - whatever the flood limit is (usually 30 seconds) ips4_noCache - 20 mins, or when tab is closed/browser quit ips4_guestTermsDismissed  - session cookie (expires when tab closed or browser quit) ips4_language  - session cookie (expires when tab closed or browser quit) ips4_cm_reg - session cookie (expires when tab closed or browser quit) ips4_location - session cookie (expires when tab closed or browser quit) ips4_currency - session cookie (expires when tab closed or browser quit) ips4_guestTransactionKey - 30 days ips4_forumpass_* - 7 days

I have tagged a developer to obtain this information for you.
This will be reviewed by our team and see how we can improve this, if necessary. 

The initial items on the page (first ~25 items) are not AJAX but each subsequent load of activity is AJAX.
If this is happening in one browser but not another, this sounds like a browser configuration or browser cache settings rule. If you use CloudFlare, server configuration to set caching headers, or anything else, this may be causing issues with Firefox. If you really want to find this, you will want to simplify your configuration. If you are able to separate your testing to a test site on a different server or separate configuration, that may help you.
It could also even be a browser bug or oddity from Firefox (they have been having a lot lately). 

Interesting the php 8 timezone error seems gone too.

That may be true but again, since our Guest cookies do not track anything about the user, there is no privacy concern.
In fact, we plan to eventually phase out ALL cookies for Guests so it's a total moot point.

Some examples for spam not processed by now.
spam_examples_01.zip

For Pages databases, images need to be uploaded through the Record Image field.