This Firefox add-on arranges tabs in a vertical rather than horizontal fashion. Vertical Tabs Reloaded is a fork of Vertical Tabs, which was discontinued. The original project is heavily inspired by the Tree Style Tab add-on.

Source Code & Issue Tracker: https://github.com/Croydon/vertical-tabs-reloaded

Installation:

• arranges tabs vertical
• ships 5 different styles for the tab sidebar (+ option to use Firefox/thirdparty add-ons style)
• hides tab sidebar in fullscreen mode (toggleable)
• hide/display manually the tab sidebar at any time with a hotkey (customizable)
• display the tab sidebar either on the left side (default) or on the right
• display the tab toolbar at top (default) or at bottom
• compact mode: hide text labels on tabs for a minimalistic tab sidebar (opt-in)

• Minimalist implementation.

• Native look and feel and ability to customize if wanted.

• Readable, maintainable and robust code.

Only the latest Firefox version is fully supported. Compatibility with the latest ESR version will not get broken on purpose, but it might be necessary to do so sometimes. Pull requests fixing compatibility with the latest ESR version have a good chance to get accepted. Pull requests concerning other versions as the latest Firefox version or the latest Firefox ESR version will not be accepted.

This project is licensed under the terms of the Mozilla Public License Version 2.0.

Credits can be found in the credits.md file.