Firefox opens link in new window, others open it in new tab

I have a cross-browser test that opens an external link in a new tab in Chrome and IE, but it opens it in a new window in Firefox. This only happens if the test is executed with Katalon. I mean, if I open the browser from my computer (Firefox 68 in a Windows 64 machine), the external links are open in a new tab, not in a new window.
I have tried to add a firefox_profile to the Desired capabilities, with the following results:

“” = 3 >> Katalon fails to open the browser
“”= 3 >> no change at all, the links are opened in a new window

This makes my FF tests fail. If somebody has a solution, I will be glad to hear it.

Thanks in advance.