Faced such a problem, my web project on Vue works perfectly in a chromium developer console in mobile emulator mode. When I came from a real device, half of the functional did not work, as the opera Mobile and Androyd Mobile opened, did not support some HTML tags or attributes.

Are there any emulators of mobile browsers exist, so that it would be convenient to test for the performance of your web application under mobile phone.?

I came across this https://dev.opera.com/articles/ Opera-Mobile-Emulator /

But it seems that this project has long been died.

Answer 1, Authority 100%

Try using Genimotion. You will receive emulators without installing Android Studio Over 10 GB

Answer 2, Authority 33%

Hyde on Android emulator from Android Studio: https://developer.android.com/studio / RUN / Emulator

Hyde by IOS emulator from Xcode:
https://ali-dev.medium.com/how-To-Simulator-For-ResPonsive-web-Testing-TEB-MAC-7870EE4FC22B