How to find this out browser version:

Google Chrome

  1. Click on the “Menu” icon in the upper right corner of the screen.
  2. Click on “Help“, and then “About Google Chrome“.
  3. Your Chrome browser version number can be found here.

https://help.zenplanner.com/hc/en-us/articles/204253654-How-to-Find-Your-Internet-Browser-Version-Number-Google-Chrome

Microsoft Edge 

  1. Open the new Microsoft Edge, select “Settings and more” at the top of the window, and then select “Settings“.
  2. Scroll down and select “About Microsoft Edge“.

https://support.microsoft.com/en-us/microsoft-edge/find-out-which-version-of-microsoft-edge-you-have-c726bee8-c42e-e472-e954-4cf5123497eb

Firefox

  1. On the menu bar, click the Firefox “Menu” and select “About Firefox”. 
  2. The “About Firefox” window will appear.
  3. The version number is listed underneath the Firefox name.

https://support.mozilla.org/en-US/kb/find-what-version-firefox-you-are-using

Safari

  1. Go to the dock and select the “Safari” icon to open the Safari browser.
  2. Choose “About Safari” under the Safari menu.
  3. A small window appears with the browser version number.

https://www.lifewire.com/check-the-version-number-of-safari-446563

Samsung Internet

  1. Open the internet app.
  2. Tap “More” > “Settings“.
  3. Tap “About Internet“.

https://www.webcazine.com/forums/how-to-determine-the-version-of-browser-on-samsung-galaxy/

Android Webview is using Chrome. 

https://developer.chrome.com/multidevice/webview/overview

Amazon Silk

  1. In the Silk browser, type “About Version” in the address bar. 
  2. Amazon Silk will display the build version string.

https://docs.aws.amazon.com/silk/latest/developerguide/troubleshooting.html

How to find this out OS (Device) version:

Windows/PC

  1. Select the “Start” button, type “Computer” in the search box.
  2. Right-click on “Computer“, and then select “Properties“.
  3. Under Windows edition, you’ll see the version and edition of Windows that your device is running.

Mac

  1. From the “Apple” menu  in the corner of your screen. Choose “About this Mac“.
  2. You should see the macOS name, such as macOS Mojave, followed by its version number.

iOS Devices

  1. Go to your iPad or iPhone’s home screen
  2. Then touch the “Settings” icon.
  3. From there, select “General“. Next, tap “About“.
  4. You’ll see all of the information about your device, including the version of your iOS device.

Chromebook

  1. Turn on your Chromebook.
  2. Connect your Chromebook to Wi-Fi.
  3. At the bottom right, select “the time“.
  4. Select “Settings“.
  5. At the bottom of the left panel, select “About Chrome OS“.
  6. Under “Google Chrome OS,” you’ll find which version of the Chrome operating system your Chromebook uses.