Been playing around with a browser tab concept that I might recreate using Gimli (https://gimli.app/). The idea is that if you have enough tabs of the same site, they will get grouped. 

For example in the image above, the user have 8 Dribbble tabs open. Grouping the tabs will provide the user with more space overall and create less clutter. 

Clicking on the semi-transparent "8" tab could provide the user with a menu displaying a thumbnail of every tab-page, a URL for each tab and so on.