Super-fast game-what's the secret?

Hello all gurus! I play 1/4+0. I lose 90% of the games in time. Sometimes with a huge gap-the opponents have 8-10 (!) seconds left, although I try to play as fast as possible. Perhaps my Internet with lags and delays, although the speed is 80-90mbit/sec, but not as slow! And here is stumbled on video-as plays Champ on pool ... chrome.google.com/webstore/detail/lichess-keyboard-input/beaekfhgnpkeaemddboeojhljnjoebfl - pay attention - he puts the pieces with one click of the mouse!!! How's that? It looks like he just chooses a cell and one of his pieces jumps there automatically!!! (I don't know on what principle - either the closest possible one, or the best one is chosen programmatically?) But the fact remains - it clicks on the cell 1 time!!! What kind of regime is this, who knows? And what are the green squares on his rook and knight? Maybe this is a secret mode for favorites, inaccessible to ordinary mortals, who first hover the mouse over the figure, then move it and as a result lose time?

Whoa mr.ordinary mortal
There's a feature to be fast in ultrabullet by using keyboard
I don't know it but some of my friends (obviously of lichess)
Uses it to be extra fast
And the chief thing it's available for all

I remember i downloaded it once. it was like hotkeys 1-5 would be a pawn or a knight etc.. but i uninstalled it cuz im a purist. Its a chrome extension, maybe someone hs the link?

Thank you, gentlemen! I was beginning to suspect something of the sort. And how many nerves I spent before that!

Don't pay attention to ultra and you need to be a real flagger to win there ....

im not a super good ultra player but there were LOTS of instances i flagged with them havin' mate in 1 :DD

Isn't the use of such an app by some ultra-bullet players in a game against opponents who don't use it a form of time cheating?

Well as you should know it's not an app just a feature of keyboard
And it is a legal way to be fast in ub
Hence no cheating is there

i wonder how to download it :(

This is the great secret of Lichess. Otherwise, everyone would be ultra-Champions :)