Alternatives to Tabs Outliner for all platforms with any license

OneTab

Save up to 95% memory and reduce tab clutter in Google Chrome and Mozilla Firefox.

Free Mac Windows Linux Chrome Firefox
Google Chrome extension Firefox extension Keep tabs on all accounts in one view Add a feature

38 Like
Tree Style Tab

This provides tree-style tab bar, like a folder tree of File Explorer . New tabs opened from links (or etc.) are automatically...
- Tabs Outliner does *two* things: 1) It can act as a session manager; and 2) It provides a more readable, visual UI for sorting & organizing tabs (e.g. indenting/grouping)..... The "Tree Style Tabs" firefox add-on, AFAIK, provides only the *second* feature.... I have yet to see ANY add-on that does both 1) and 2). Therefore, I do consider "Tree Style Tabs" to be an alternative to Tab Outliner -- depending on what feature-set one is wanting. Guest • Jun 2015 • 2 agrees and 0 disagrees
Free Mac Windows Linux Firefox
Firefox extension Tabbed browsing Tree view Add a feature

49 Like
Session Buddy

Manage Your Browser Sessions View and save the state of all open browser tabs in the current or past browser sessions. Quickly restore your tabs and resume your...

Free Web Chrome OS Chrome
Google Chrome extension Safari extension Add a feature

23 Like
Tab Mix Plus

Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed...

Free Open Source Mac Windows Linux Firefox
Built-in e-Book converter Close right/left tabs Crash recovery Firefox extension ... Right-click tab menu Undo close tab list Add a feature

34 Like
Sidewise Tree Style Tabs

A dockable sidebar for Chrome featuring vertical Tree Style Tabs, Tab Hibernation, and much more. * Tree Style Tabs: organize your tabs in a tree view. Supports...

Free Mac Windows Linux Chrome
Tabbed browsing Add a feature

13 Like
Tabli

Tabli is a tab manager for Google Chrome that provides fast switching between browser windows and tabs and the ability to save and restore windows. Tabli runs...

Free Open Source Mac Windows Linux Chrome
No features added Add a feature

3 Like
Session Box

Using websites with multiple accounts at the same time is made easy. Create an independent tab with a click of a button.

Freemium Mac Windows Linux Chrome Firefox
Session sharing Anonymity Multiple login on one browser Session management Add a feature

5 Like
TabsFolders

TabsFolders is a session and bookmark manager. It allows you to save all your tabs with one click. Organize into sub-folders. Easily share your hundreds of links with...

Freemium Mac Windows Linux Web
Google Chrome extension Crash recovery Firefox extension Safari extension ... Tabbed browsing Add a feature

3 Like
Open Tabs Next to Current

Always open new tabs to the right of the current one(which is not the same as setting browser.tabs.insertRelatedAfterCurrent to true). You can however get the default...

Free Mac Windows Linux Firefox
Firefox extension Add a feature

3 Like
Tab Groups

Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch...

Free Open Source Mac Windows Linux Waterfox Firefox
Customizable Firefox extension Support for Keyboard Shortcuts Legacy Firefox Addon ... Tabbed browsing Add a feature

2 Like
- Discontinued The extension is no longer updated and it doesn't work on Firefox 57. It still works on XUL-based Firefox forks like https://alternativeto.net/software/waterfox/
Tabsets

Google Chrome extension to keep all the tabs you have open in a set so that you can open them all again later, even on another device.

Free Open Source Mac Windows Linux Chrome
Google Chrome extension Tabbed browsing Add a feature

5 Like
Simple Tab Groups

Create, modify and quick change tab groups. Features: - Full rewrite addon without any third-party libraries - New Design (fork old addon design...

Free Open Source Mac Windows Linux Firefox
Colored Tabs Firefox extension Integrated Search Support for Keyboard Shortcuts ... Multi-windows Add a feature

2 Like
MySessions

MySessions is a simple session manager. You can quickly save your current browser state and reload it whenever necessary. Features: - Multilanguage interface: ru...

Free Mac Windows Linux Firefox
Crash recovery Firefox extension Multiple languages Add a feature

2 Like
Duplicate Tabs Closer

Detects and automatically closes duplicate tabs.

Free Open Source Self-Hosted Firefox
Firefox extension Tabbed browsing Add a feature

2 Like
Open Tabs

Google Chrome extension that lets you create groups of tabs, save them, and reopen them later.

Free Open Source Windows Chrome
Google Chrome extension Add a feature

1 Like
- Discontinued Twitter, Github and main website (www.opentabs.io) linked to from the Google Chrome Webstore are all deleted