SOCKS5 or HTTP in an Anti-Detect Browser? Choosing the Protocol per Profile

The first dropdown you meet when attaching a proxy to an anti-detect browser profile is the protocol. Most people pick whichever connects first and never think about it again. Usually that's fine. But the choice affects where DNS gets resolved, how much it has to do with WebRTC (less than people think), and where to look when something breaks.

We cover the protocols themselves in SOCKS5 vs HTTP proxies. This article is narrower: how to choose inside an anti-detect browser profile.

The short answer

• Use the protocol your provider documents as primary. It's usually the best-maintained endpoint.
• If both are supported and you have no special requirement, the difference is small. What matters is testing the profile after setup.
• Don't expect the protocol to fix WebRTC. That's handled by the browser's WebRTC setting.

Difference 1: where DNS is resolved

A DNS leak means the lookup for a site's hostname goes out over your local network instead of through the proxy, revealing your real network location to whoever sees those lookups.

• HTTP proxy. For HTTPS sites, the browser sends CONNECT hostname:443 to the proxy. The proxy resolves the hostname; your machine doesn't need to look up the target.
• SOCKS5 proxy. The protocol allows the client to send either a hostname (proxy resolves it) or an IP it resolved itself. Chromium-based browsers generally hand the hostname to a SOCKS5 proxy rather than resolving it locally.

So in a normal configuration, neither protocol should produce local DNS lookups for the sites you visit inside the profile. "Generally" isn't "always", though, especially across browser versions and custom builds. Run a DNS leak test once the profile is set up rather than assuming.

Difference 2: UDP and WebRTC

The SOCKS5 specification includes UDP relaying and HTTP proxies don't support UDP. Inside a browser, that difference mostly disappears:

• Chromium's documentation says SOCKS5 in Chrome "is only used to proxy TCP-based URL requests. It cannot be used to relay UDP traffic."
• WebRTC connections usually run over UDP, so picking SOCKS5 does not route WebRTC through the proxy.
• Anti-detect browsers handle this with a per-profile WebRTC setting, typically options like replacing the exposed address with the proxy IP, disabling WebRTC, or leaving it real. The browser decides which addresses web pages can see.

If a WebRTC test shows the wrong address, change the WebRTC setting. Switching protocols won't help.

A related note: HTTP/3 runs over QUIC, which is UDP-based. Through a proxy, browsers normally fall back to HTTP/2 or HTTP/1.1 over TCP. That's expected behaviour, not a fault.

Difference 3: what the provider supports

From our provider data, checked 2026-10-05. Pay attention to ports. Providers commonly expose each protocol on a different port, and a SOCKS5 URL pointed at an HTTP port is one of the most common causes of "proxy failed" in profile checks.

Choosing per profile

Standardising has a practical payoff. When something breaks, you can tell straight away whether it's one IP or the whole setup, because every profile is configured the same way.

Setting it up in AdsPower and GoLogin

Both AdsPower and GoLogin let you choose the proxy type separately for each profile and offer a button to check the proxy from the profile editor. Exact options and labels vary by version, so match these steps to what you see:

1. In the profile's proxy settings, choose the protocol.
2. Enter host, port, username and password, making sure the port matches the protocol.
3. Run the proxy check and confirm it connects and returns the expected exit IP and country.
4. Set WebRTC, time zone, language and geolocation to follow the proxy IP.
5. Save, launch the profile and run the checks below.

The AdsPower tutorial and GoLogin tutorial walk through the full profile editor in each tool.

Checks after setup

Open a few test pages inside the profile and confirm:

• Exit IP matches the address the provider assigned
• IP type and location match what you bought
• DNS leak test shows no resolvers belonging to your local ISP
• WebRTC shows the proxy IP or no public IP, never your real address
• Time zone and language match the IP's location

Our guide to checking whether a proxy IP is clean lists tools for each check. Do this once per new IP, and again after browser updates, since engine changes can alter default behaviour.

Troubleshooting

SOCKS5 won't connect. Confirm you're using the SOCKS5 port, then check whether the account uses IP allowlisting and your current IP isn't on the list. Note that allowlisting is tied to your computer's public IP, which may change if you work from a different network.

The proxy check passes but sites won't load. Try the other protocol's endpoint once. If it works, report the problem to the provider with the failing host and port.

Authentication errors only in one protocol. Some providers issue different credentials or formats per protocol. Copy them fresh from the dashboard rather than editing by hand, and URL-encode special characters if the tool takes a full proxy URL.

Everything passes but a site still flags the profile. The protocol is almost never the reason. Look at IP reputation, fingerprint consistency and account history instead.

The protocol is plumbing. Whatever you choose, run your accounts within each platform's rules.