Usage should be self-explanatory.
Source available here: https://github.com/Lulonaut/ArrowSwitcher

Install

• License: GNU General Public License v3.0 or later
• Weekly downloads: 0
• Average daily users: 3
• Rating: 5/5 of 1 ratings
• Created: 2022-05-07 19:50:55
• Last updated: 2022-05-08 19:56:46
• Homepage:
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/tab-arrow-switcher/
• API: tabarrowswitcher@lulonaut