diff --git a/mindspace-long-image.mjs b/mindspace-long-image.mjs
index 61d4623..f887764 100644
--- a/mindspace-long-image.mjs
+++ b/mindspace-long-image.mjs
@@ -9,12 +9,25 @@ const DEFAULT_VIEWPORT_HEIGHT = 720;
 const MAX_LONG_IMAGE_HEIGHT = 20000;
 export const LONG_IMAGE_EXPORT_STYLE = `
 [data-mindspace-public-share],
+[data-mindspace-public-share-dialog],
+[data-mindspace-public-share-dialog-panel],
 .publication-share-fab,
 .publication-share-sheet {
   display: none !important;
+  visibility: hidden !important;
+  opacity: 0 !important;
+  pointer-events: none !important;
 }
 `;
 
+export const LONG_IMAGE_EXPORT_SELECTORS = Object.freeze([
+  '[data-mindspace-public-share]',
+  '[data-mindspace-public-share-dialog]',
+  '[data-mindspace-public-share-dialog-panel]',
+  '.publication-share-fab',
+  '.publication-share-sheet',
+]);
+
 export function isLongImageDownloadRequest(query) {
   const value = String(query?.download ?? query?.export ?? '').trim().toLowerCase();
   return value === 'long-image' || value === 'long_image' || value === 'png';
@@ -53,6 +66,23 @@ async function launchChromium(chromium) {
   }
 }
 
+export async function hideLongImageExportChrome(page) {
+  await page.addStyleTag?.({
+    content: LONG_IMAGE_EXPORT_STYLE,
+  }).catch(() => null);
+  await page.evaluate?.((selectors) => {
+    for (const selector of selectors) {
+      for (const element of document.querySelectorAll(selector)) {
+        element.setAttribute('data-memind-long-image-hidden', '1');
+        element.style.setProperty('display', 'none', 'important');
+        element.style.setProperty('visibility', 'hidden', 'important');
+        element.style.setProperty('opacity', '0', 'important');
+        element.style.setProperty('pointer-events', 'none', 'important');
+      }
+    }
+  }, LONG_IMAGE_EXPORT_SELECTORS).catch(() => null);
+}
+
 export async function renderLongImage({
   htmlPath = null,
   url = null,
@@ -84,6 +114,7 @@ export async function renderLongImage({
       width: clampDimension(size.width, DEFAULT_VIEWPORT_WIDTH, 2400),
       height: Math.min(clampDimension(size.height, DEFAULT_VIEWPORT_HEIGHT, MAX_LONG_IMAGE_HEIGHT), 2400),
     });
+    await hideLongImageExportChrome(page);
     await fsPromises.mkdir(path.dirname(destination), { recursive: true });
     await page.screenshot({
       path: destination,
diff --git a/mindspace-long-image.test.mjs b/mindspace-long-image.test.mjs
index 503f7b8..0895606 100644
--- a/mindspace-long-image.test.mjs
+++ b/mindspace-long-image.test.mjs
@@ -1,7 +1,9 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
 import {
+  hideLongImageExportChrome,
   isLongImageDownloadRequest,
+  LONG_IMAGE_EXPORT_SELECTORS,
   LONG_IMAGE_EXPORT_STYLE,
 } from './mindspace-long-image.mjs';
 
@@ -13,7 +15,25 @@ test('recognizes supported long-image download query values', () => {
 
 test('long-image capture style hides platform page actions', () => {
   assert.match(LONG_IMAGE_EXPORT_STYLE, /\[data-mindspace-public-share\]/);
+  assert.match(LONG_IMAGE_EXPORT_STYLE, /\[data-mindspace-public-share-dialog\]/);
   assert.match(LONG_IMAGE_EXPORT_STYLE, /\.publication-share-fab/);
   assert.match(LONG_IMAGE_EXPORT_STYLE, /\.publication-share-sheet/);
   assert.match(LONG_IMAGE_EXPORT_STYLE, /display:\s*none\s*!important/);
+  assert.ok(LONG_IMAGE_EXPORT_SELECTORS.includes('[data-mindspace-public-share]'));
+});
+
+test('long-image capture actively hides injected platform chrome before screenshot', async () => {
+  const calls = [];
+  const page = {
+    async addStyleTag(options) {
+      calls.push(['style', options.content]);
+    },
+    async evaluate(_fn, selectors) {
+      calls.push(['evaluate', selectors]);
+    },
+  };
+  await hideLongImageExportChrome(page);
+  assert.deepEqual(calls[0][0], 'style');
+  assert.match(calls[0][1], /\[data-mindspace-public-share\]/);
+  assert.deepEqual(calls[1], ['evaluate', LONG_IMAGE_EXPORT_SELECTORS]);
 });