How to Set Up a Proxy in Mozilla Firefox (Built-In Settings & Extensions)

Mozilla Firefox is unique among major browsers: it has its own independent proxy configuration that does not rely on your operating system's network settings. This makes it ideal for using a proxy in Firefox without affecting any other apps on your machine.

What You Will Need

Before starting, have your LTEasy proxy credentials ready from your dashboard:

• Proxy host — e.g. proxy.lteasy.shop
• Port — e.g. 10500
• Username & Password (if using auth-based access)
• Protocol — SOCKS5 or HTTP

Method 1: Firefox Built-In Proxy Settings

This is the simplest approach — no extensions needed.

1. Open Firefox and click the hamburger menu (☰) in the top-right corner.
2. Go to Settings (or type about:preferences in the address bar).
3. Scroll to the bottom of the General section and click Settings… under Network Settings.
4. Select Manual proxy configuration.
5. For SOCKS5: Leave the HTTP Proxy field empty. Fill in the SOCKS Host field with your proxy host and the port. Select SOCKS v5.
6. For HTTP proxy: Enter your host and port in the HTTP Proxy field and check Also use this proxy for HTTPS.
7. Click OK.

Firefox will prompt you for credentials the first time a proxied request is made. Enter your LTEasy username and password, and check Remember this password to avoid repeated prompts.

Critical Step: Enable Proxy DNS (Prevent DNS Leaks)

By default, even with SOCKS5 configured, Firefox may resolve DNS queries locally — revealing your real location to DNS servers even though your traffic is going through the proxy. To prevent this:

1. In the Network Settings dialog (same screen as above), check the box labelled Proxy DNS when using SOCKS v5.
2. Click OK.

This ensures that all DNS resolution happens on the proxy side — no leaks.

Method 2: FoxyProxy Extension (Multiple Proxies & Rules)

If you manage multiple proxies or want to set rules (e.g. only proxy certain domains), FoxyProxy is the gold standard extension for Firefox.

1. Open Firefox and go to addons.mozilla.org.
2. Search for FoxyProxy Standard and click Add to Firefox.
3. Click the FoxyProxy icon in the toolbar, then click Options.
4. Click Add to create a new proxy.
5. Fill in:
   • Title: LTEasy (or any name)
   • Proxy Type: SOCKS5 (or HTTP)
   • Proxy IP address or DNS name: your proxy host
   • Port: your proxy port
   • Username / Password if using auth
6. Click Save.
7. Click the FoxyProxy icon and select Use proxy LTEasy for all URLs (or configure pattern rules).

Using IP Whitelist Authentication Instead of Username/Password

LTEasy supports IP-based authentication as an alternative to username/password. If you whitelist your current IP in the LTEasy dashboard, Firefox will connect without any credential prompts — useful for automation or shared machines.

Verifying Your Proxy

After configuration, visit ipinfo.io in Firefox. The IP and location shown should match your LTEasy proxy's exit node. To verify there are no DNS leaks, use dnsleaktest.com — all DNS queries should resolve through the proxy's location, not your real ISP.

Setting Up Multiple Proxy Profiles

Firefox supports multiple browser profiles, each with independent proxy settings. This is useful if you need different proxies for different tasks running simultaneously:

1. Type about:profiles in the address bar.
2. Click Create a New Profile and give it a name.
3. Click Launch profile in new browser.
4. Configure a different proxy in that Firefox window's Network Settings.

Each profile's proxy runs independently — you can have multiple Firefox windows open with different LTEasy proxies active simultaneously.

Troubleshooting

• Firefox ignores proxy settings — make sure you selected Manual proxy configuration and not Use system proxy settings. The system setting will override your manual config.
• Credential dialog appears on every page — check that you have clicked Remember this password. If Firefox still prompts repeatedly, switch to IP whitelist authentication in your LTEasy dashboard.
• DNS leak detected — ensure Proxy DNS when using SOCKS v5 is checked in Network Settings.
• Only some sites go through proxy — check the No proxy for: field in Network Settings. Clear it or remove entries that should be proxied.