Pinned Tab Limiter από Cazdef

Manually set a limit on pinned tabs (including zero) globally or per-window. When you exceed the limit a tab is automatically unpinned (newest, oldest or least recently used, depending on your preference).

Made to be used in conjunction with RudyF's "Limit Tabs" extension (although this works standalone) as that extension ignores pinned tabs - giving seasoned hoarders a loophole.