The extensions adds keyboard shortcuts for closing visible tabs on the current window. It doesn't close active, hidden and pinned tabs.

Defaults:
Close Other Tabs - Alt+O
Close Tabs to Left - Alt+L
Close Tabs to Right - Alt+R

Could be changed on the page: about:addons > Manage Extension Shortcuts

Install

• License: BSD 2-Clause "Simplified" License
• Weekly downloads: 0
• Average daily users: 7
• Rating: 0/5 of 0 ratings
• Created: 2022-11-15 12:51:57
• Last updated: 2022-11-15 17:30:17
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/close-tabs-hotkeys/
• API: {052f1b4f-f125-436f-ab3e-b9a4e13555a0}