Rated 3 out of 5 stars
Is there a support page for this?
I'm seeing odd results, where
1. the first item in a bookmarked tab group is not opened, and
2. the first tab often appears to the left of the "+" button to add a new tab.
If you could email me, firstname.lastname@example.org, and tell me which browser you use, which version of the plugin you have installed, and which other plugins you have installed, I would be happy to look into this.