docs: add start_url references

auth/profiles.mdx

@@ -112,6 +112,28 @@ print("Live view:", kernel_browser2.browser_live_view_url)
 ```
 </CodeGroup>
 
+## Override opening existing tabs in a new session
+
+Profiles can restore tabs saved in the profile. Pass `start_url` with the profile to open a specific page instead when the new browser starts.
+
+<CodeGroup>
+```typescript Typescript/Javascript
+const browser = await kernel.browsers.create({
+  profile: { name: 'profiles-demo' },
+  start_url: 'https://example.com/dashboard',
+});
+```
+
+```python Python
+browser = await kernel.browsers.create(
+    profile={"name": "profiles-demo"},
+    start_url="https://example.com/dashboard",
+)
+```
+</CodeGroup>
+
+The same behavior applies to browser pools configured with both a profile and start url.
+
 ## Loading a profile into an existing browser
 
 You can load a profile into a browser after it has been created using the [update browser endpoint](https://kernel.sh/docs/api-reference/browsers/update-browser-session).

browsers/pools/overview.mdx

@@ -52,6 +52,7 @@ const pool = await kernel.browserPools.create({
   stealth: true,
   headless: false,
   timeout_seconds: 600,
+  start_url: "https://example.com",
   viewport: {
     width: 1280,
     height: 800
@@ -72,6 +73,7 @@ pool = kernel.browser_pools.create(
     stealth=True,
     headless=False,
     timeout_seconds=600,
+    start_url="https://example.com",
     viewport={
         "width": 1280,
         "height": 800
@@ -84,7 +86,7 @@ print(pool.id)
 
 ### Pool configuration options
 
-Pools can be pre-configured with options like custom extensions, supported viewports, residential proxies, profiles, and more. See the [API reference](https://kernel.sh/docs/api-reference/browser-pools/create-a-browser-pool) for more details.
+Pools can be pre-configured with options like start url, custom extensions, supported viewports, residential proxies, profiles, and more. See the [API reference](https://kernel.sh/docs/api-reference/browser-pools/create-a-browser-pool) for more details.
 
 ## Acquire a browser
 

reference/cli/browsers.mdx

@@ -21,6 +21,7 @@ Create a new browser session.
 | `--stealth` | Enable stealth mode to reduce automation fingerprints. |
 | `--headless` | Launch without GUI/VNC access. |
 | `--kiosk` | Launch in Chrome kiosk mode. |
+| `--start-url <url>` | Initial page to open on launch. |
 | `--output json`, `-o json` | Output raw JSON object. |
 
 ### `kernel browsers delete <session-id>`
@@ -432,6 +433,7 @@ Create a new browser pool.
 | `--size <n>` | Number of browsers in the pool (required). |
 | `--fill-rate <n>` | Percentage of the pool to fill per minute. |
 | `--timeout <seconds>` | Idle timeout for browsers acquired from the pool. |
+| `--start-url <url>` | Initial page to open for new browsers. |
 | `--output json`, `-o json` | Output raw JSON object. |
 
 ### `kernel browser-pools get <id-or-name>`
@@ -447,6 +449,8 @@ Update pool configuration.
 | Flag | Description |
 |------|-------------|
 | `--size <n>` | Updated pool size. |
+| `--start-url <url>` | Initial page to open for new browsers. |
+| `--clear-start-url` | Clear the pool start URL. |
 | `--discard-all-idle` | Discard all idle browsers and refill. |
 | `--output json`, `-o json` | Output raw JSON object. |