>  that nobody is willing to read

Actually, from what users are writing me, you are not right. Some even thanks me for detailed explanations. 

Somebody not want to read? Nobody force to.

hotkey is impossible without embedding a script on every page, which will require access to tabs content, which i am strongly against (not only because of the security reasons, but also because this is VERY resources unfriendly, for example there is some extension which utilize this, if you will try to install them when you have several hundreds open tabs, Chrome will crash or will be unresponsive for half a hour). There some rumors that google work on some hotkeys possibilities for extensions, yet i don't know actually.

It is also impossible to add modifier key to to close tab. 

And It is impossible to hide tab bar, as far as i know.

Yet it is possible to add additional extension button to address bar. Maybe I will do this, I was already think about something like this, especially when there will be custom icons for tabs functionality, i have plans to add them from address bar also, by this button (with a menu) in addressbar line.

hotkey is impossible without embedding a script on every page, which will require access to tabs content, which i am strongly against (not only because of the security reasons, but also because this is VERY resources unfriendly, for example there is some extension which utilize this, if you will try to install them when you have several hundreds open tabs, Chrome will crash or will be unresponsive for half a hour). There some rumors that google work on some hotkeys possibilities for extensions, yet i don't know actually.

It is also impossible to add modifier key to to close tab. 

And It is impossible to hide tab bar, as far as i know.

Yet it is possible to add additional extension button to address bar. It is good idea and maybe I will do this.

Actually planed, and this is something from top priorities. Yet will be implemented maybe slightly different, but will satisfy same use case.

This feature is for sure needed. It will appear along with support additional (independent) tree documents.

This feature is for sure needed. It will appear along with support additional (accidental) tree documents.

I add this as separate idea - not to show TO window - please vote on it.

Maybe I am not understand you, i will think about this later. Please add any specific example of "most other applications" that work as you want. Or describe some use case for this option.

By the way, there is undo scroll to undone any accidental scroll.