diff --git a/apps/web/src/components/ChatView.logic.test.ts b/apps/web/src/components/ChatView.logic.test.ts
index 2b9a18cb90fb7d49d82e794de80216deb3acafd1..be279f220e7e0cb36da23e807bb07d8004f0c273 100644
--- a/apps/web/src/components/ChatView.logic.test.ts
+++ b/apps/web/src/components/ChatView.logic.test.ts
@@ -2180,6 +2180,10 @@ describe("shouldRefocusComposerOnWindowFocus", () => {
     expect(shouldRefocusComposerOnWindowFocus(element("DIV", { role: "textbox" }))).toBe(false);
   });
 
+  it.each(["IFRAME", "WEBVIEW"])("leaves a focused %s preview alone", (tagName) => {
+    expect(shouldRefocusComposerOnWindowFocus(element(tagName))).toBe(false);
+  });
+
   it("leaves a focused terminal alone in the drawer and the right panel", () => {
     expect(
       shouldRefocusComposerOnWindowFocus(element("BUTTON", { within: "data-terminal-owner" })),
diff --git a/apps/web/src/components/ChatView.logic.ts b/apps/web/src/components/ChatView.logic.ts
index 2707050070e921cbd8ec213e6abd8e9e8f3db8ef..ed1422a71109c95a678c0e0be697936b84a38956 100644
--- a/apps/web/src/components/ChatView.logic.ts
+++ b/apps/web/src/components/ChatView.logic.ts
@@ -1350,6 +1350,8 @@ export function shouldRefocusComposerOnWindowFocus(
     activeElement.tagName === "INPUT" ||
     activeElement.tagName === "TEXTAREA" ||
     activeElement.tagName === "SELECT" ||
+    activeElement.tagName === "IFRAME" ||
+    activeElement.tagName === "WEBVIEW" ||
     activeElement.isContentEditable === true ||
     activeElement.getAttribute("role") === "textbox"
   ) {