Useless, without any interest, stupid !
But what are these extensions that are useless ?!

Which does not concern security, no more privacy !

I have never been confronted with a trick about Rickroll with all my life !
In Africa, Asia, in the rest Europe, which can have "Be Rickrolled" ?

It is a delirium of Anglo-Saxon, Anglophones, or Anglophiles.
Typically ethnocentric !

A song against Fakenews : https://www.youtube.com/watch?v=ATGCa1GzQZk

A song of nostalgia : https://www.youtube.com/watch?v=XRq1HqmYe8o

The hymn of the European Union : https://youtu.be/GWe2-0SGmRU?t=4178

Go now, go for extensions against that !