basically on specific occasions, closing the "main" firefox windows with your pinned tabs and tab groups before closing an alternate firefox window on a 2nd physical monitor that's displaying a live graph (think forex...) will result in EVERYTHING disappearing, including pinned tabs, tab groups and so on. So now, I have to use 2 browsers to do something I used to do with a single one, lest I want to lose days worth of fluid workflow. I even tried reloading backups of the user profile and it simply does not work. Oh, and leaving the browser open with 10-15 tabs during 24 hours with no user activity = tripling of the used memory up to a point where it chokes other applications down. Awesome.
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