ClickTabUniq von PKxk8J

ClickTabUniq closes duplicate tabs directly from Firefox's right-click menu.

Choose how duplicates are detected:
<ul>
<li>URL</li>
<li>URL without hash</li>
<li>Title</li>
</ul>

By default, tabs in different tab groups, containers, and split views are protected so separate browsing contexts are not mixed together.
If you need a wider cleanup, you can add menu actions that ignore those boundaries.

The menu stays compact when only one action is enabled, and expands into grouped choices when multiple rules or cleanup modes are enabled.
Pinned tabs are cleaned up only when you run the command from a pinned tab.

Optional notifications can show progress and the final result.