Add custom user agent in chrome

To override the user agent string from Chrome DevTools:

1. Press Command+Shift+P (Mac) or Control+Shift+P (Windows, Linux, Chrome OS) to open the Command Menu.

   

   Figure 1. The Command Menu
2. Type network conditions, select Show Network conditions, and press Enter to open the Network conditions tab.
3. In the User agent section disable the Select automatically checkbox.

   

   Figure 2. Disabling Select automatically
4. Select a user agent string from the list, or enter your own custom string.

Reference : https://developers.google.com/web/tools/chrome-devtools/device-mode/override-user-agent