diff --git a/crates/obscura-cdp/src/dispatch.rs b/crates/obscura-cdp/src/dispatch.rs
index 1fce87b..bb3b4a1 100644
--- a/crates/obscura-cdp/src/dispatch.rs
+++ b/crates/obscura-cdp/src/dispatch.rs
@@ -220,9 +220,11 @@ fn is_v8_free_method(method: &str) -> bool {
         | "Target.setAutoAttach"
         | "Target.getBrowserContexts" | "Target.createBrowserContext"
         | "Target.disposeBrowserContext" | "Target.getTargetInfo"
+        | "Target.detachFromTarget" | "Target.activateTarget"
         | "Browser.getVersion" | "Browser.close" | "Browser.getWindowForTarget"
         | "Browser.setDownloadBehavior" | "Browser.getWindowBounds" | "Browser.setWindowBounds"
         | "Page.enable" | "Page.disable" | "Page.getFrameTree"
+        | "Page.setDownloadBehavior"
         | "Page.setLifecycleEventsEnabled"
         | "Page.addScriptToEvaluateOnNewDocument" | "Page.removeScriptToEvaluateOnNewDocument"
         | "Page.setInterceptFileChooserDialog" | "Page.getNavigationHistory"
diff --git a/crates/obscura-cdp/src/domains/target.rs b/crates/obscura-cdp/src/domains/target.rs
index 748f1a6..ac3d37f 100644
--- a/crates/obscura-cdp/src/domains/target.rs
+++ b/crates/obscura-cdp/src/domains/target.rs
@@ -195,6 +195,10 @@ pub async fn handle(method: &str, params: &Value, ctx: &mut CdpContext) -> Resul
             Ok(json!({ "success": true }))
         }
         "setAutoAttach" => Ok(json!({})),
+        // No multi-target lifecycle to manage: obscura runs one page per session.
+        // Ack these so Chrome-shaped clients that call them do not warn (issue #340).
+        "detachFromTarget" => Ok(json!({})),
+        "activateTarget" => Ok(json!({})),
         "getBrowserContexts" => {
             Ok(json!({ "browserContextIds": [ctx.default_context.id] }))
         }