Tab Deduplication — No More Duplicate Tabs

Tab deduplication catches the most wasteful browser habit: opening a page you already have in another tab. When you navigate to a URL that matches an existing open tab, SuperchargeNavigation surfaces a prompt asking whether you want to switch to that tab instead. One click and you’re there — no duplicate, no extra memory cost, no hunting through the tab bar.

How It Works

When a navigation matches an existing tab’s URL, SuperchargeNavigation injects a lightweight prompt into the page before it fully loads. The prompt presents two options: switch to the existing tab, or stay on the current page. If you don’t interact, the prompt auto-dismisses after 10 seconds and the page loads normally. The decision is always yours.

The duplicate check compares the navigating URL against all currently open tab URLs. This happens entirely within Chrome, with no network request and no external lookup.

Settings

When to Use This

Heavy link-clickers: You follow many links from emails, Slack, and other apps throughout the day. Tab Deduplication catches the cases where you’ve already opened that link in a previous session and forgotten about it.

Research with many sources: When revisiting a site you already have open, the prompt saves you from accumulating two or three copies of the same page across a long research session.

Memory management: Every duplicate tab consumes RAM. Over a full workday, catching even a handful of duplicates keeps your tab count lower and your browser lighter. Pair this with Smart Tab Grouping to keep your existing tabs organized so duplicates are less likely in the first place.

After restoring a workspace: When you restore a Workspace and already have some of those tabs open, Tab Deduplication helps prevent overlap from growing out of control.

Relationship to Other Features

Tab Deduplication is the preventive layer. Vertical Tabs makes existing tabs visible enough that you’re less likely to open a duplicate in the first place. Smart Tab Grouping clusters tabs by domain so overlaps are obvious. Together these three features form a natural deduplication stack — visibility, organization, and active detection.

Privacy

Tab Deduplication reads the URLs of open tabs to perform the duplicate check. No URLs are stored beyond the in-memory check, and no data is sent to any external server.