Dual Page Sync

Tracking since Apr 19, 2026.

Changelog

• Apr 19, 2026
  description

  For those who want to compare original and translated versions of foreign development documentation and various other documents:
  
  View two windows simultaneously and scroll together to compare original text
  New "Split Tab Mode" allows you to view and sync two screens within a single browser tab
  URL sync feature allows both browsers to move together when navigating to different pages (can be disabled if desired)
  Scroll sync feature allows manual adjustment if scroll position isn't ideal
  You can choose between percentage-based default scroll mode and element-based synchronization scroll mode.
  If sync disconnects while doing other tasks, use the reconnect button to restore connection
  Control window can be hidden and sync can be terminated via x button
  Not available on certain Google services like Google Drive, Gmail, and other sites that don't support sync functionality like Figma.

  For those who want to compare original and translated versions of foreign development documentation and various other documents side-by-side:
  
  • View two browser windows at once and scroll them together to compare original and translated text
  • New "Split Tab Mode" lets you view and sync two pages inside a single browser tab
  • Split Window preserves your logged-in session, cookies, and browsing context, so sites that previously rejected being reopened in a new window now work
  • URL sync keeps both windows navigating together when you move to a different page (can be disabled)
  • Scroll sync lets you manually adjust position anytime if it drifts
  • Choose between percentage-based default scroll mode and element-based (XPath) sync scroll mode, with improved alignment accuracy on pages of different heights
  • If sync disconnects while doing other work, the Reconnect button restores the link
  • Hide the control window, or end sync entirely via the × button
  • Split Tab Mode now has an Exit button to leave split view while staying on the current URL
  • Split Tab Mode now works on many sites that previously blocked iframe embedding through X-Frame-Options or CSP headers. Some sites (Google Drive, Gmail, Figma, and others using JavaScript-based frame protection) still restrict embedding in ways the extension cannot bypass

• Apr 19, 2026
  permissions

  activeTab, tabs, storage, system.display

  activeTab, tabs, storage, system.display, declarativeNetRequestWithHostAccess

Permissions & access

Permissions

activeTabtabsstoragesystem.displaydeclarativeNetRequestWithHostAccess

Host access

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