I think it would be great to create a way to add a new favourite website without opening it directly.
The solution may be needed if users want to add a new favourite website with quite simple URL, or if they are transfering their favourite websites from another browser that cannot be selected as an option for transfering in Orion
It's not a vital feature, however, I think that it could be useful for some people. I was surprised to see that Safari also doesn't have this option, but almost all other web browsers have it.
It could be done in three different ways:
1) Set it as an option after right-clicking on start page
2) Add a "+" icon, which allows you to add new favorite, at the end of your current favourites
3) Perfect scenario - combine previous two options and add a "Remove "Add favorite" button" option after right-clicking. It is the best way in my opinion, because it's a versatile option: using "+" icon allows you to add a new favorite faster, but iIf someone doesn't want to see additional "+" icon on his start page, he can remove it by right clicking on start page and selecting "Remove "Add favorite" button" option
Here is an illustration of how it might look: