Is there a way the window can be shown as centered in the screen ?

Only this extension can help you navigate in tabs when u have 667 tabs opens.. And yes...Firefox rocks..even after opening 677 tabs

Works just like intended!

Always hoping for this feature, glad someone has started to tackle it. Not there yet. Feels like I've opened another browser window on top of the current window, and as far as I can tell, it just shows an inelegant list of tabs, bookmarks and history. I can already open another window to access two of those, so I don't really feel like I'm coming out ahead of anything with this. Nor does there seem to be any actual commands, for instance, in Vivaldi there is Detach Tab, Close Tabs to the Left, Close Tabs to the Right, Tile Vertically, etc. And if an input field is in focus, the default hotkey isn't going to fire. Vivaldi displays a small, elegant, Quicksilver/Alfred-esque field above the current page view. This feels as though it's taking me out of the current space entirely. Again, this is probably a work in progress, please keep at it. I'll check back! Thanks for sharing your work.

Great extension to manage your gazillion tabs easily. Mimics the behaviour of Vivaldi's quick commands quite nicely, next step would be to add the settings to the list of searchable things.

This is off to a great start! Would love the ability to access browser pages like settings and addons, and for the design to match that of Vivaldi's, but it's still a fantastic addon regardless!