It's a bit hidden, but you can actually change this in Quantum:

1. type "about:config" in the address bar
2. click the "I accept the risk" button
3. In the search field at the top, type "browser.newtabpage.activity-stream.topSitesCount"
4. double-click the item that appears in the list
5. enter the number 18 and click "OK".

You can actually have more than three rows if you want as well - entering 24 gives you 4 rows, 30 gives you 5 rows, etc.

Hope that helps!

Hey,

Success!

Ty

Haymanata said

I try to reconfigurate it in about:config and still show only 2 rows by 6 boxes, 3 row still hidden even when i configurate it to 24 or more.

After you changed the value, did you close ad then restart Firefox, in order for the change to take effect  ?

Happy112 said

Haymanata said

I try to reconfigurate it in about:config and still show only 2 rows by 6 boxes, 3 row still hidden even when i configurate it to 24 or more.

After you changed the value, did you close ad then restart Firefox, in order for the change to take effect  ?

Edit : And while I was typing my post, you got it to work - well done  !

But you inadvertently marked your own post as 'Chosen Solution' instead of user1929's .......

You can rectify that by clicking the 'Undo' button to the right of your post and then mark user1929's post as 'Chosen Solution'.