Many Tabs Manager Many Tabs Manager is an advanced Firefox sidebar extension designed to help you regain control over your browser tabs. It provides a powerful, all-in-one interface to filter, sort, and organize your tabs across multiple windows. Key Features

Filter Tabs by Text: Quickly find any tab using a regular expression search on the title or URL.
Filter Tabs by Age: Easily identify forgotten or recently-used tabs by filtering based on how many days ago they were last accessed.
Sort Tabs: Organize your tabs by name or by the last time they were accessed, in either ascending or descending order.
Group by Window: Collapse or expand groups of tabs by their respective windows for a cleaner, more organized view.
Manage Tabs: Easily select multiple tabs to close or move to a new window.
Context Menu Actions: Right-click on a tab to quickly switch to it, even if it's in another window.

How to Use

Install the Extension: The extension is designed to be used in the Firefox sidebar.
Open the Sidebar: Click the Many Tabs Manager icon in your browser's toolbar to open the sidebar.
Browse and Filter:
- The sidebar will list all your open tabs.
- Use the Filter tabs (regex, title or URL) input field to filter the list by text.
- Use the Filter by Age input and dropdown to show tabs that are Older than or Newer than a specified number of days.
- Check the Current Window Only checkbox to see only the tabs from your active window.
Sort and Group:
- Use the Sort By dropdown to change the order of the tabs.
- Use the Group By dropdown to group tabs by their windows. Click on a window title to collapse or expand the group.
Manage Tabs:
- Click the checkbox next to each tab to select it. Use Select All to choose all visible tabs.
- Click Close Selected to close the chosen tabs.
- Click Move Selected to New Window to move the selected tabs to a new browser window.
Switch Tabs:
- Right-click on any tab in the list to open a context menu.
- Click Switch to Tab to activate that tab and bring its window to the front.

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Published Firefox add-on:

Many Tabs Manager