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HiberTab helps you keep many Firefox windows and tabs open while controlling which tabs stay loaded and which tabs can be hibernated.

It is designed for users who want more flexible tab memory control without giving the extension access to website content.

Main features:

• Automatically hibernate inactive tabs by time.
• Limit how many tabs stay loaded in memory.
• Hibernate tabs in minimized windows.
• Hibernate tabs when Firefox is not focused.
• Automatically load tabs in the focused window.
• Choose fast or slow tab loading mode.
• Protect pinned tabs, audible tabs, active-window tabs, recently used tabs, private tabs, and manually protected tabs.
• Manually unload or load tabs from the popup or tab context menu.
• Mute or unmute audible tabs in bulk.
• Use hotkeys for faster tab control.
• Optionally hide the HiberTab tab context menu entry.
• Customize the visual style of unloaded tabs through Firefox userChrome.css.

Privacy:

HiberTab uses only minimal permissions: alarms, menus, and storage.

It does not request access to all websites, does not use content scripts, does not read page content, does not inspect network requests, and does not collect or transmit browsing data.