So I'm running a Firefox Developer Edition (I do this to have my work related stuff separated from my personal stuff). I was testing A/B testing software on our website, when I noticed that Private window shared some of the non-Private window cookies. I have made a [https://drive.google.com/file/d/1TmwXjrIWwG90dh61UG_SOLKa8LFrtm3j/view recording of the issue] in action. On the left side is a private mode window (notice the missing extensions), on the right side is a normal window. They are both open on the same page and first thing to notice, is when I refresh the private window, cookies in inspector "flash" in both windows, indicating that there are changes. After that, I'm interested in two cookies: "gbuuid" and "growthBookVariants", it seems like they are shared and when I refresh one windows, it's value is "synced" to the second window. Now this is annoying, as I have to clear those cookies to test if I get a different variant. When a colleague tested it on Windows, it didn't happen so maybe it's something with my settings/extensions? I attached my privacy settings, but when I fiddled with those, nothing seemed to change.