Browsing the Lottiefiles website often causes the tab to crash

I’ve tried on Chromium-based web browser, Chrome and Firefox.
On all of them, when browsing enough pages of something I search (example : “image” as a query), eventually the tab crashes (out of memory error on Chrome, no idea what’s on Firefox).
Often it first slows down, failing to show some animations, and only later crashes the tab.
And, sadly, when I refresh, it will go back to the first page of the search query results…
I have plenty of memory for tens of animations on the screen…

How could it be?