Firefox Settings Proxy Plugin
Firefox recommends using switchyomega
download link:
https://addons.mozilla.org/zh-CN/firefox/addon/switchyomega/
After installation, click the ring icon in the upper right, click Options:
Click "Import/Export" in the pop-up window; Select "Restore from backup file" and import the SwitchyOmega folder -> SwitchyOptions.bak (OmegaOptions.bak) in the XX-net directory;
For other parts, please refer to Installation and Use-SwitchyOmega of Chrome