Tab Session Manager by sienori

Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.

• Save and restore windows and tabs
• Manage sessions with name and tags
• Auto save when window is closed
• Auto save at regular intervals
• Import and export sessions
• Compatibility with Chrome extension
• Cloud sync
• Support tab groups

Chrome version:
https://chrome.google.com/webstore/detail/tab-session-manager/iaiomicjabeggjcfkbimgmglanimpnae
Edge version:
https://microsoftedge.microsoft.com/addons/detail/jkjjclfiflhpjangefhgfjhgfbhajadk

USERS:

• Since updating to version 3.0.0, there is a problem that the session list can not be opened. Please see here for solutions. https://github.com/sienori/Tab-Session-Manager/wiki/IndexedDB-Error
• Vote on Mozilla website for APIs/bug fixes needed by session managers, so they can be better. https://github.com/sienori/Tab-Session-Manager/issues/364

Version 6.6.0

• Supported for saving and restoring tab groups (in Chrome)
  • To save tab groups, you need to install an additional extension.
• Supported for restoring window title (in Firefox)
• Fixed an issue where sessions could not be registered to startup

Version 6.5.0

• Added auto-sync option for cloud sync
• Changed to show cloud sync account names on the settings page
• Changed to wait 30 seconds when executing backup on startup
• Implemented suggestions for tag input
• Implemented double-click to open session
• Fixed broken style of lazy loading page
• Fixed an issue with lazy loading tabs closing on automatic updates

Version 6.4.0

• Supported for dark mode
  • This is enabled when the OS is set to dark mode.
• Fixed an issue where an error appears when disabling/re-enabling an extension
• Fixed an issue where multiple pop-ups could not be opened

Version 6.3.0

• Implemented undo/redo of the operation
  • If you've deleted an important session, you can undo it!
• Supported for right-clicking on the session list / save button / open button
  • Right click to open the menu
• Supported for middle-clicking on the tab in the popup
  • Middle click to open the tab in the background

See more release notes
https://github.com/sienori/Tab-Session-Manager/releases

I was inspired by the following great add-ons, developed as an add-on for Firefox 57 or later.
Session Manager by Michael Kraft
http://sessionmanager.mozdev.org/index.html