I would like to be able to close multiple tabs at the same time without moving my mouse cursor to the close button of the next tab that has been resized, so that I can efficiently close multiple tabs.

Google chrome has this function which works like this: after pressing the close button on a tab, if the mouse cursor isn't moved out "tab area", the other tabs are not resized and shift to the left. This allows a user to close multiple tabs just by clicking multiple times in the same spot without moving the cursor to the next tab's close button.

That's a good idea.