From the macosxhints Pick Of The Week department: Taboo – Prevent tab closing stupidity in Safari. “The macosxhints Rating:[Score: 10 out of 10], Developer: Obsessive Compulsive Development, Price: Free
“A simple PotW this week, as it really only does one thing. Taboo is a plug-in for Safari that warns you if you hit the red…” more.
I cannot tell you how many times I have screamed “No!” as I mean to close a tab or another document and inadvertently closed a dozen precious tabs in Safari. This is a must-have!