Why i3 stuck just open firefox only?

i installed manjaro i3 for my laptop with intel i3 specs and 4gb ram. but why just opening firefox has burdened the ram and cpu my laptop stuck.

What else are you running?

Look at htop.

Your addons also might be a cluprit for high resources.

I don’t know how to see activity in htop.

i just only installed Notion Web Clipper in Addons.

to me it looks like you have 4