diff --git a/docs/reference/plugin-authoring.md b/docs/reference/plugin-authoring.md
index 64ccb750965..3d3a7fc32a0 100644
--- a/docs/reference/plugin-authoring.md
+++ b/docs/reference/plugin-authoring.md
@@ -110,9 +110,7 @@ Aborting the `signal` rejects the call with `cancelled`. Treat an error `code` y
 
 #### Files and assets
 
-Preview: isolated frames are off by default for now (set `ORCA_PLUGIN_ISOLATED_FRAMES=1` to try
-them); until they ship, desktop frames behave like browser clients below. With them on, in the desktop
-app each plugin's frames run in their own isolated process, storage and origin,
+In the desktop app each plugin's frames run in their own isolated process, storage and origin,
 `orca-plugin-frame://<key>/`, served from your plugin folder. Load scripts, styles, images, fonts,
 WASM and workers by relative URL (`<script src="lib/app.js">`, `new Worker('worker.js')`,
 `WebAssembly.instantiateStreaming(fetch('lib/mod.wasm'))`), and `localStorage` and IndexedDB
diff --git a/docs/reference/plugin-isolated-frames.md b/docs/reference/plugin-isolated-frames.md
index 9435dad97e3..30450b047a1 100644
--- a/docs/reference/plugin-isolated-frames.md
+++ b/docs/reference/plugin-isolated-frames.md
@@ -71,9 +71,9 @@ Every plugin frame on desktop is an Electron `<webview>`:
 - **Input**: Orca's window shortcuts are forwarded from a focused guest through the browser tab path, minus
   browser-page chords (address bar, find, reload, history, page zoom); a custom editor's save chord still
   rides `editor.keydown`, so it fires once. Editable fields get Orca's Cut/Copy/Paste context menu.
-- **Switch (default off)**: isolated guests ship off, so merging changes nothing; a separate one-line PR
-  flips the constant `PLUGIN_ISOLATED_FRAMES_DEFAULT` in `src/main/plugins/panels/plugin-frame-isolation.ts`.
-  `ORCA_PLUGIN_ISOLATED_FRAMES=1` (dev, e2e) turns guests on and `=0` off, overriding the
+- **Switch (default on)**: rolling back is the constant `PLUGIN_ISOLATED_FRAMES_DEFAULT` in
+  `src/main/plugins/panels/plugin-frame-isolation.ts`. `ORCA_PLUGIN_ISOLATED_FRAMES=0` turns guests off
+  for one machine and `=1` on, overriding the
   `experimentalPluginIsolatedFrames` setting; all are main-process only. Off, frames use the `srcdoc` iframe
   (never offered `orca.shell`/`orca.files`), and components panels say they are not available.
 - **Compatibility**: existing single-file plugins load unchanged. Browser clients (serve/web) have no
diff --git a/src/main/plugins/panels/plugin-frame-isolation.test.ts b/src/main/plugins/panels/plugin-frame-isolation.test.ts
index 73d8f5ee1d2..55eedf3aeda 100644
--- a/src/main/plugins/panels/plugin-frame-isolation.test.ts
+++ b/src/main/plugins/panels/plugin-frame-isolation.test.ts
@@ -5,17 +5,24 @@ import {
 } from './plugin-frame-isolation'
 
 describe('isolated frames switch', () => {
-  it('defaults off, follows the setting, and lets the env var override either way', () => {
-    expect(PLUGIN_ISOLATED_FRAMES_DEFAULT).toBe(false)
-    expect(isPluginFrameIsolationEnabled({}, {})).toBe(false)
-    expect(isPluginFrameIsolationEnabled({ experimentalPluginIsolatedFrames: true }, {})).toBe(true)
-    expect(isPluginFrameIsolationEnabled({}, { ORCA_PLUGIN_ISOLATED_FRAMES: '1' })).toBe(true)
+  it('defaults on, follows the setting, and lets the env var override either way', () => {
+    expect(PLUGIN_ISOLATED_FRAMES_DEFAULT).toBe(true)
+    expect(isPluginFrameIsolationEnabled({}, {})).toBe(true)
+    expect(isPluginFrameIsolationEnabled({ experimentalPluginIsolatedFrames: false }, {})).toBe(
+      false
+    )
+    expect(
+      isPluginFrameIsolationEnabled(
+        { experimentalPluginIsolatedFrames: false },
+        { ORCA_PLUGIN_ISOLATED_FRAMES: '1' }
+      )
+    ).toBe(true)
     expect(
       isPluginFrameIsolationEnabled(
         { experimentalPluginIsolatedFrames: true },
         { ORCA_PLUGIN_ISOLATED_FRAMES: '0' }
       )
     ).toBe(false)
-    expect(isPluginFrameIsolationEnabled(null, { ORCA_PLUGIN_ISOLATED_FRAMES: 'yes' })).toBe(false)
+    expect(isPluginFrameIsolationEnabled(null, { ORCA_PLUGIN_ISOLATED_FRAMES: 'yes' })).toBe(true)
   })
 })
diff --git a/src/main/plugins/panels/plugin-frame-isolation.ts b/src/main/plugins/panels/plugin-frame-isolation.ts
index 530af98e6b3..b2f375b97ff 100644
--- a/src/main/plugins/panels/plugin-frame-isolation.ts
+++ b/src/main/plugins/panels/plugin-frame-isolation.ts
@@ -4,8 +4,8 @@
  * user-gesture methods are offered); on, a guest that cannot be set up fails closed.
  */
 
-/** Off until the flip PR: flipping (or rolling back) the feature is this one line. */
-export const PLUGIN_ISOLATED_FRAMES_DEFAULT = false
+/** Rolling the feature back is this one line. */
+export const PLUGIN_ISOLATED_FRAMES_DEFAULT = true
 
 export const PLUGIN_ISOLATED_FRAMES_ENV = 'ORCA_PLUGIN_ISOLATED_FRAMES'
 
diff --git a/tests/e2e/plugin-isolated-frame.spec.ts b/tests/e2e/plugin-isolated-frame.spec.ts
index d7668844099..bce7bd02f37 100644
--- a/tests/e2e/plugin-isolated-frame.spec.ts
+++ b/tests/e2e/plugin-isolated-frame.spec.ts
@@ -236,7 +236,7 @@ test('a multi-file plugin panel runs as an isolated guest with assets by URL', a
   }
 })
 
-test.describe('with isolated frames off (the default)', () => {
+test.describe('with isolated frames turned off', () => {
   test.use({ orcaAppExtraEnv: { ORCA_PLUGIN_ISOLATED_FRAMES: '0' } })
 
   test('a plugin panel keeps the srcdoc iframe and is offered no gesture methods', async ({