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If I only have one tab open in Firefox and I close that tab Firefox exits.

How do I disable this behaviour?

A solution that prevents me to from closing the last tab or opens a new empty tab (or my homepage) is equally acceptable.

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up vote 1 down vote accepted

You could also add an extension like Tab Mix Plus.

Here's a screenshot of the config page. You can do one of two things:

  1. Click the "Do not close window when closing last tab" option to open a new blank tab
  2. Select the "Prevent last tab from closing"

enter image description here

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I chose this answer since I already had Tab Mix Plus installed – Nifle Oct 21 '11 at 20:10

there's an about:config tweak that should do this: browser.tabs.closeWindowWithLastTab set it to false.

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clean way of handling this situation without an extension – JW8 Oct 21 '11 at 19:17

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