undo tab close in firefox

This is really not cli but I think it's neat.
Sample Output
previously closed tab will reopen

2009-09-05 18:01:32

What Others Think

All Firefox versions?
DaveQB · 608 weeks and 4 days ago
I like it !
alvinx · 608 weeks and 4 days ago
Is it really a command line trick?
Josay · 608 weeks and 4 days ago
There are many other Firefox shortcut keys too, but none of them are anything to do with the command line.
jedifu · 400 weeks ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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