Dont they work in any other browser? Maybe there is a simple way to make them work in, lets say, Google Chrome?

Yes, thank you! I realized this method by myself.
Maybe there is a way to close a Chrome tab without activating Chrome browser and sending keyboard commands to it?

I cant close 1 tab in Google Chrome, only all the program. Usually this is the last open tab. I am newbie here, so even this simple task is too difficult for me. I can do it only by simulating mouse movements and clicking on the close sign, but I am sure there are smarter ways to do this. Anybody co...