Few steps to unity-like look for you Gnome Linux

Install GNOME Extensions for you Chomium browser:

https://wiki.gnome.org/Projects/GnomeShellIntegrationForChrome/Installation

From the Gnome shell extensions web app, install this staff:

Install Gnome Tweak Tool

You will also want GNOME Tweak Tool installed, which most distributions shipping GNOME should have installed out of the box. Otherwise it should be available in the repositories.

Run the Tweak Tool and find Dash to Dock and open the configurations menu for it (click the spanner/gear cog icon next to the extension).

To give the new Dock a more Unity look and feel, simply tick the box that says "Panel Mode". Change appearance, icon sizes and set intelligent hide mode depending on your preferences. You may find just turning into Panel Mode is good enough.

Also click on the 'Launchers' tab and tick the box 'Move the applications button to the beginning of the dock'.

Choose a theme and icons

I use the custom "United Gnome" theme based on a Unity8 design concept: https://github.com/godlyranchdressing/United-GNOME, which you may want to use in dark/darkets variations with turned “Global Dark Theme” in “Tweak Tool.
Set icons to "Paper-Mono-dark" or “Ubuntu-mono-dark” in the same place.

Move the window buttons to the left by

gsettings set org.gnome.desktop.wm.preferences button-layout 'close,minimize,maximize' in you console.

OR. Just give a try to Gnome Layout Manager!

About: https://github.com/bill-mavromatis/gnome-layout-manager
To get started with Gnome Layout Manager, open a terminal and enter the following:

wget https://raw.githubusercontent.com/bill-mavromatis/gnome-layout-manager/master/layoutmanager.sh chmod +x layoutmanager.sh ./layoutmanager.sh