How to check whether the http version is 1.1 or 2.0

FireFox browser

• Address bar input:https://www.baidu.com/
• Press F12, select 网络, and click 重新载入as shown below:
  
• Click on an http request, and the Http version will be displayed on the right, as shown in the figure below:
  
  

Internet Explorer

• The IE browser is relatively straightforward, press F12, select "Network", and you can see it.
  

Edge browser

• Press F12, uncheck "Blocked Cookies", and refresh once.
• Right-click an http request, select "Title Options", check "Protocol", and you can see it.
  

Google Chrome

• Google Chrome has a lot of online introductions, reference: https://www.zhihu.com/question/68397041