How to get MORE than only one line of 6 apps????

Have you seen this under settings:

YES we cAN CHANGE TO 4 ROWS buttt IT NEVER holdsssssssssss!

Such settings are stored in prefs that you can inspect in the about:config page (prefs.js in the Firefox profile folder).

• about:config => browser.newtabpage.*rows

You can check for issues with the preferences.

• https://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save