How to generate the roam graph to appear in emacs

When I execute org-roam-graph the graph is shown in firefox as I defined in the config file

(setq org-roam-graph-viewer "/Applications/Firefox.app/Contents/MacOS/firefox")

But I would like the graph to be opened inside emacs as done in docs.

How can I configure that?
(BTW, I am using spacemacs).

(setq org-roam-graph-viewer nil) will use view-file by default.

(setq org-roam-graph-viewer #'eww-open-file) will open the graph in eww.

However, the gif in the docs actually look like the graph is being opened in a browser.

Thanks!
I guess that I mainly want the ability to click on a node in the graph and that it will open the corresponding note.
Do you know how can I achieve this?