The goal:

" Temporarily and quickly remove them. "

The fastest way is to run a script in the browser console that removes all such elements:

document.querySelectorAll( ' .ad-library-item ' ).forEach(el = > el.remove());

This immediately removes all 50+ elements and requires no page reload.

Option analysis:

A & B : Preventing load events is unreliable and does not remove already-created DOM nodes.

C : Correct—console code can remove all matching DOM elements instantly.

D : Possible but extremely slow; removing 50+ elements one by one in the inspector is not “quick.”

Therefore, C is the best answer.

JavaScript Knowledge References (text-only)

The browser console can run arbitrary JavaScript that manipulates the DOM.

document.querySelectorAll() returns all matching DOM nodes.

Nodes can be removed using .remove().