This addon fades away tabs that hasn't been visited for a while.
It separates all your tabs in 3 groups – 'recent', 'older' and 'oldest' by the last access time, and applies different opacity for them.

TreeStyleTabs extension is required for it to run.

Install

• License: Mozilla Public License 2.0
• Weekly downloads: 10
• Average daily users: 353
• Rating: 4.6667/5 of 3 ratings
• Created: 2022-03-20 15:21:16
• Last updated: 2022-05-11 20:47:00
• Homepage:
• Support site and email
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• Orig: https://addons.mozilla.org/en-US/firefox/addon/tst-fade-old-tabs/
• API: tst_fade_old_tabs@emvaized.com