Thanks both @Grisu and @kev2021
I have checked with a couple of forums I have joined and the first forum logs me out as soon as I close the browser and the second keeps me logged in even after browser is closed and restarted.
What I would like to do is remove the login-button at the bottom of each topic thread as I dislike this for security and looks perspective, but give the option to allow a logged in user to stay logged in (even after browser is closed) for a recommendation for 30 days or longer, this then also helps remove the need for the login-button at the bottom of each topic and encourage more visits to the forum without the need not to keep logging in each time etc.
Note, I have already removed the login-button at the bottom of each topic thread and will be working on the option to allow forum members to stay logged in after the browser is closed. 
FWIW, Last year A New law in Italy requires “banner consent at least 6 months” so lots to consider 
In a completely sane world, madness is the only freedom (J.G.Ballard).
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