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Problem with new version Rated 5 out of 5 stars
Newest version doesn't work properly. When opening link in new tab, first one is ok but when you click another link, new tab is not visible, it's kind of "stacked" with the another. You can still navigate to it with keyboard shortcuts or mouse gestures but it's not visible. Something wrong with collapsing/expanding. I disabled my other extensions but no luck. Hope this will be fixed soon, Tree Style Tabs is certainly one of the best add-ons for FF!
mouseover tooltip link Rated 4 out of 5 stars
For some reason, Hovering mouse over a link makes the "tooltip" pop up to the bottom right of the screen, not left.
When I disable Tree Style Tab, tooltip is on left hand side.
But great addon!