Good but...
- I can't change the "Preview" manually (eg; I don't want to have a RGPD or cookie information in this preview)
- Why some history appear on the menu ?!? no button for disable that?
- When I drag some element I need to reorganize approxymately all
- Need each time to go on "configuration menu" for add new tiles...
- When I have only 3/4 colunm, the height is so crazy why I can't change the height or create button for auto height?
- Backup config?!? if I want to use this config in another browser?
- Why startxxl in "default search engine" when I use duckduckgo and I can't change...

And I think that's all, the rest is good, contact me if you need some other information
I edit this post if needed