Is there a "mobile" browser for desktop Windows?

Question

Browsers

Is there a browser, or how to set up the usual ones (Chrome / Firefox, etc.) for desktop Windows so that sites think that you are accessing from a mobile browser?
I know that in Chrome DevTools and so on you can watch both from a mobile phone, this is not very convenient for my needs.

Answer 1

Random User-Agent extension.

Extension disabled

Extension included - Android

Answer 2

Change the user-agent and many sites will show you the mobile version of the site.
You can also install an android emulator and install mobile browsers into it.

Answer 3

Install bluestacks or another android emulator and run the mobile version of the browser in it.