Yeah, custom numbers of column would be great.
In addition to this feedback here is a list of what I miss compared to beloved Infinity Tab extension from Chrome (tried many different one and it's the best one for me in design and functionality)
Custom layout (must have)
Thanks for this you can use each row for some related sites

Custom icon size (nice to have)

Custom icons (Should have: sometime site doesn't provides one)


Links to browser tools (Nice to have)
e.g.: bookmarks, extensions, settings

Here is differents: Infinity Tab extension vs Orion Start Page

