No. Though I'm hoping with 61 "Faster switching between tabs" it'll be better. After changing the user chrome and updating I had to disable/enable the addon to

No. Though I'm hoping with 61 "Faster switching between tabs" it'll be better. After changing the user chrome and updating I had to disable/enable the addon to get the tabs to render again. Sometimes when creating a new tab seems to be ungodly slow I can make it a bit better by going to the preferences and unchecking / rechecking the "optimize tree restoration with cache" box. Still on pre-quantum on my home PC but I let my work machine update and have been keeping a hopeful "wait and see" approach since... It does seem to be improving at least. But the bug of closing the last child of tree triggering the loading of the next tree before switching back to the previous sibling (as specified in preferences) remains, it's going to be a while before it hits feature and behavior parity with the original.