>I also block first-party cookies This is the front loaded approach which can cause breakage. I prefer the back loaded approach of using an extension like Coo

>I also block first-party cookies This is the front loaded approach which can cause breakage. I prefer the back loaded approach of using an extension like Cookie Auto Delete or similar that deletes cookies once you're away from a domain for a set amount of time (I think mine is set to 2 minutes).