Seems like a good extension, especially for touch enabled devices. I would suggest placing the source code at a link since this seems open source as the lack of it may be off-putting to some people.

Thanks again for the extension.

Dark mode or theme support please?

I've wanted something like this for a long time. I like the extension. Thank you for your work. I have a couple of suggestions:
1. An option to automatically close the Tabs Grid when clicking on a tab in the grid.
2. When clicking on the button with Tabs Grid already open, that it switches to the Tabs Grid tab instead opening a second Tabs Grid.