# Pass command-line switches

In this tutorial you will add extra command-line switches to Chroma and Junglefox launches while keeping the coordinated fingerprint intact and avoiding blocked or redundant flags.

Note

You can't set the start page by passing a URL as an argument. Use the startPage property when creating or updating the profile; only pass feature flags as command-line switches.

# Prerequisites

Completion of the Quickstart guide
An existing profile
Local API running (default: http://localhost:5050)

# 1. Launch a profile with extra arguments

Start a profile while adding a couple of benign switches.

from kameleo.local_api_client.models import BrowserSettings

client.profile.start_profile(profile_id, BrowserSettings(
        arguments=[
            'disable-notifications',
            'mute-audio'
        ]
))
print('Started profile with custom arguments')

await client.profile.startProfile(profile.id, {
    arguments: ["disable-notifications", "mute-audio"],
});
console.log("Started profile with custom arguments");

await client.Profile.StartProfileAsync(profile.Id, new BrowserSettings
{
    Arguments = new List<string>
    {
        "disable-notifications",
        "mute-audio"
    }
});
Console.WriteLine("Started profile with custom arguments");

If any supplied switch is blacklisted, Kameleo returns an error explaining which argument is incompatible.

# 2. Blacklisted switches

Some native browser switches are blocked to preserve fingerprint integrity and avoid conflicts. See the full list: Blacklisted browser switches.

# 3. Full references

For comprehensive lists of native browser command line options, see:

Chroma: https://peter.sh/experiments/chromium-command-line-switches/
Junglefox: https://wiki.mozilla.org/Firefox/CommandLineOptions