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Tab Killer Ver.2.0.2009110201 for Mozilla Firefox

What's this? ...abstract

This disables tabbed browsing features of Firefox completely. I was inspired from the the anti-tabbed browsing project. So, this is for users which want Firefox to be an SDI application.

The feature "History" -> "Recently Closed Tabs" becomes "Recently Closed Windows". You can reopen closed windows from the menu.

If you wish to enhance tabbed browsing features, I recommend you to try the Tabbrowser Extensions.

Download Links to XPI packages

If you see any problem, see FAQ at first. If there is no solution, post a report to the issue tracker on the GitHub please.

If you use Mozilla Suite or Netscape 7, see How to install and update? (contains important notes) This extension includes a self uninstaller. Please open the preferences panel Preferences > Advanced > Tab Killer, click the button Uninstall in the dialog. When you couldn't remove it completely, see How to uninstall by hand?

Language Packs

Released version includes following language packs:

  • English (en-US)
  • Japanese (ja-JP)
  • French (fr-FR, by Jean-Bernard Marcon)
  • Polish (pl-PL, by Leszek (teo) Życzkowski)


Introduction of Tab Killer (Japanese)
This is an archive of the document introducing this extension, for the XUL contest in the Mozilla.Party.jp 5.0.

History There is the updating history and the list of known problems.

  • Works on Minefield and Firefox 3.6.
  • Works on Minefield and Shiretoko.
  • Supporting of Firefox 2 and older versions is dropped.
  • Fixed: Inifinity error when windows are closed on Firefox 3 disappeared.
  • Improved: By default, you can choose how treat requests for new tab (or tab closing) to, when you do actions about tabs.
  • Fixed: Works with All-in-One Gestures correctly.
  • Added: Polish locale is available. (made by by Leszek (teo) Życzkowski)
  • Improved: In Firefox 2, "Recently Closed Window" feature is available instead of "Recently Closed Tabs".
  • Fixed: An fatal error about getting chrome URL of the default browser in the lately Firefox disappeared.
  • Modified: CSS rules for hidden menu items have been brushed up on a few points.
  • Fixed: Menu items for tabbed browsing have been shown correctly when Tab Killer is disabled.
  • Improved: A new setting to turn Tab Killer off has been available.
  • Released.
  • Fixed: Configuration dialog has worked correctly.
Last modified:2019/05/05 23:02:02