1. Search in Windows settings: Firewall and network protection--select to allow applications through the firewall--change settings, find fiddler, and check the option;
2. Set fiddler--Tools--Options, the screenshot is as follows:
3. Connect the mobile phone and the computer to the same wifi, ipconfig check the computer IP: A, set the proxy A:8888 on the mobile phone
Visit: A:8888 on your mobile browser, download the certificate and install it
4. If the installation fails, an error message is reported: The certificate cannot be installed because the certificate file cannot be read.
Method: Manually change the suffix of the certificate to .crt.