Using the Firefox Tabulator Extension

Vertigo Tabs is a simple vertical tabs extension for Firefox - gHacks Tech News

5 Extensions to Organize Your Firefox Tabs Quickly and Easily

Tabliss - New Tab – Get this Extension for 🦊 Firefox (en-US)

Tab List Board – Get this Extension for 🦊 Firefox (en-US)

Using the Firefox Tabulator Extension

View tab previews, save and restore sessions with the Tabby - Window & Tab Manager extension for Firefox - gHacks Tech News

Firefox 85 gets option to control Home and New Tab page extensions - gHacks Tech News

Auto Tab Discard – Get this Extension for 🦊 Firefox (en-US)

Work with the Tabs API - Mozilla

Tree Style Tab – Get this Extension for 🦊 Firefox (en-US)

Tile Tabs WE – Get this Extension for 🦊 Firefox (en-US)

How to add Vertical Tabs to Firefox.