Is Multiple premoves legal?

I read on online forum that u can do multiple pre moves by adding extension in browser , i saw some streamers doing multiple premoves , can my account get closed if i try it? or is it legal.

i want multiple premoves I hope they will add it some day soon.. without an extension

#2 no lichess will not make multiple premove as thibault says as chess is not a fast game
Chess is long game sport

#3 That seems like a weird thing to say for the owner of the first online chess website to implement ultrabullet...

#3 then why are there premoves at all?

@pasc1.
#1 It is not illegal, nor cheating, nor unfair, and you will not get banned nor restricted for using it.
#2 That being said, people will hate you if you do use them. So use it at your own risk.
#3 I don't know how to get the extension to work, so don't ask me.

@SamAnyayG Chess is a long game, but Lichess is alive thanks to bullet & blitz and rapid. Playing classical online is so hard. You know, second montior..

@shadow1414 Many of the guys who claimed that they use multiple pre moves in bullet game got their account closed thats why i had this doubt , it can be a coincidence though.

@Wiedergaenger
They download an extension premove