Google Chrome supports tabbed browsing, which means you can have multiple pages open at the same time in a single window. You can close the tabs or window, exit the program and, if necessary, force the close process (to be used as a last resort).
Steps
Method 1 of 7: Close tabs on Android and iOS

Step 1. Press the button that displays the tabs
This is a number (the number of tabs open) inside a square at the top right between the search bar and the menu button.
- The Chrome app does not support multi-window mode, but it can open multiple tabs simultaneously.
- The interface of tablets resembles that of computers and the button that displays tabs will not be necessary.

Step 2. Tap the x icon
It is located at the top right of each tab.

Step 3. Close all tabs simultaneously
Open the parameters (the 3 vertical dots) after displaying the tabs then select Close all tabs.

Step 4. Close incognito tabs (on Android only)
If you turn off your screen (with the power button) while an incognito tab is open, you will see "Close all incognito tabs" on the screen after you turn it back on. Double-click on it to be taken to the Home screen. All private browsing tabs will be closed.
Private browsing tabs can be closed with the same method as regular tabs
Method 2 of 7: Close the Chrome app on Android

Step 1. Touch the recent apps key
This key is usually found at the bottom right of the screen and looks like a square or overlapping squares depending on your phone or tablet. Tap it to display a list of recently used apps.

Step 2. Slide the screen up or down
This will allow you to navigate through your recent apps.

Step 3. Slide the Chrome window to the right
The application will close and stop running in the background.
You can also press the "x" button at the top right of the app in the recent apps window if you're using Android 6 or later
Method 3 of 7: Force quit Chrome on Android

Step 1. Open the Settings application
This is the cogwheel icon that opens a list of phone settings.

Step 2. Tap Applications
This option can be found in the section Device and allows you to view a list of applications on your device.

Step 3. Tap Chrome on the Apps screen
The applications are listed in alphabetical order.

Step 4. Tap Force Stop
Your device will force the Chrome process to close.
This option should only be used if the application has frozen or you are having difficulty starting it
Method 4 of 7: Close Chrome on iOS

Step 1. Double-click the home button
A list of recent apps will appear.

Step 2. Slide the screen left or right
You will be able to navigate through your recent applications.

Step 3. Slide the Chrome window upwards
Chrome will stop running in the background.
Method 5 of 7: Force quit Chrome on iOS

Step 1. Double-click the home button
Select Chrome from the list of recent apps. If Chrome has frozen or is responding again, it is probably already in use.

Step 2. Press and hold the power button
After a few seconds, the button Switch off will appear.

Step 3. Long press the power button again
This will force close all applications in use and you will be taken to the Home screen.
Method 6 of 7: Close Chrome tabs, windows, and processes on a computer

Step 1. Click the "x" icon on a tab
This icon is located to the right of each tab.
- To close a tab with keyboard shortcuts, press Ctrl + W on Windows or Linux and ⌘ Cmd + W on Mac.
- You can simultaneously close all tabs in a window by pressing Ctrl + ⇧ Shift + W / ⌘ Cmd + ⇧ Shift + W.

Step 2. Click the x in the corner of the window
On Windows, the x is at the top right and allows you to close the program unless there is a second window open. On Mac, it's at the top left and closes the window, but lets the process run.
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Multiple windows can be opened by pressing Ctrl + N /
⌘ Cmd + N or by clicking on a tab and dragging it off the tab bar. Each window supports multiple tabs.

Step 3. Click the ≡ button and select Exit
This button is located at the top left of the window. It closes all windows and all tabs and stops the process.
- Windows keyboard shortcuts Ctrl + ⇧ Shift + Q or Alt + F4 + Q can be used.
- The Mac keyboard shortcut ⌘ Cmd + Q can be used.
Method 7 of 7: Force close Google Chrome on a computer

Step 1. Open the task manager or the “Force Quit” menu
Press on
Ctrl + Alt + Del (on Windows) or on ⌘ Cmd + ⌥ Option + Esc (on Mac). If the browser is not responding, you can use this keyboard shortcut to view all the processes running on your computer.

Step 2. Select Google Chrome
In the list of processes that appears, click Google Chrome.

Step 3. Stop the process
Press on Stop the process (on Windows) or Force quit (on Mac). This button is located at the bottom right of the task manager.