> ## Documentation Index
> Fetch the complete documentation index at: https://atmos.oxygen.wiki/llms.txt
> Use this file to discover all available pages before exploring further.

# Global settings

> Configure default tabs, locale, WebRTC, GPU spoofing, and noise for browser profiles

## Overview

Open **Browser → Global settings** to configure the defaults used when you create browser profiles. You can override these values for an individual profile in the profile editor.

<Frame>
  <img src="https://mintcdn.com/oxygenparadigm/WVKU6cYMibX-8Goj/images/atmos_ui/browser/atmos_browser_global_settings.png?fit=max&auto=format&n=WVKU6cYMibX-8Goj&q=85&s=8043d3afc1545cd0474ab746846ab16f" alt="Global settings for browser profiles" width="2209" height="1327" data-path="images/atmos_ui/browser/atmos_browser_global_settings.png" />
</Frame>

## Startup tabs

Choose what opens when a profile starts:

| Mode        | Behavior                                    |
| ----------- | ------------------------------------------- |
| **New**     | Open a new tab                              |
| **Session** | Restore tabs from the saved browser session |
| **List**    | Open a configured list of URLs              |

Use **List** when every new profile should open the same set of websites. You can select a different mode when creating or editing a profile.

## Locale and location

| Setting           | Description                                                                              |
| ----------------- | ---------------------------------------------------------------------------------------- |
| **Search engine** | Default search engine for profiles                                                       |
| **Language**      | Use a selected browser language or derive it from the proxy IP address                   |
| **App language**  | Follow **Language** or use a separate browser interface language                         |
| **Timezone**      | Use the timezone detected from the proxy IP address or a selected value                  |
| **Geolocation**   | Ask, allow, or block location access; location data can be based on the proxy IP address |

Keep language, timezone, geolocation, and proxy location aligned to maintain a coherent profile identity.

## WebRTC and UDP protection

The default **Block unproxied UDP** policy allows UDP traffic only when Oxygen Atmos can send it through the profile proxy. This applies to UDP-based traffic such as WebRTC, QUIC, and HTTP/3.

* If the proxy supports UDP, Oxygen Atmos sends supported UDP traffic through the proxy.
* If Oxygen Atmos cannot proxy the UDP traffic, it blocks that traffic instead of allowing a direct connection.
* Blocking direct UDP prevents websites from discovering the device's real IP address by bypassing the profile proxy.
* Proxies without UDP support remain usable for TCP traffic.

<Warning>
  **Public Interface** may expose direct network interface information. Use **Block unproxied UDP** when preventing direct IP exposure is required.
</Warning>

## GPU spoofing

| Mode              | Description                                 |
| ----------------- | ------------------------------------------- |
| **Strict**        | Apply the strongest GPU identity controls   |
| **Compatibility** | Balance spoofing with website compatibility |
| **Vendor**        | Preserve the selected GPU vendor identity   |
| **Disabled**      | Do not apply GPU spoofing                   |

## Noise

You can independently enable noise for:

* **Canvas**
* **Audio**
* **Rectangles**

The profile preview shows whether noise is enabled before you save the profile.