How to configure Firefox proxy settings

1. Open Firefox
2. Click on Settings ☰ icon > Options (or Preferences on a Mac).

3. Click the General tab.
4. Scroll down to the Network Proxy section and click Settings.

5. Check the Manual proxy configuration box .
6. Add endpoint (e.g.: server.proxyland.io) and port (e.g.: 9090) to HTTP field

7. Click OK.
8. Check your new IP – https://www.iplocation.net/