Given Firefox 18, when I use "File" -> "Close Window" (or hit Ctrl+Shift+W) with another browser window open and multiple tabs in the current window, I am asked "You are about to close [some number of] tabs". However, when I do the same thing in the last open Firefox window, it asks me if I want to quit and whether to save the tabs for the next invocation, without specifying how many tabs I have open in that window.

Often, I want to get a quick count of the number of tabs open, and aborting closing the window is a quick way to get that number. But as it is, if I have only one browser window open, I need to open another browser window simply to get the question I want.

Can Firefox be configured to display the count of the number of tabs also when closing the last browser window of the running instance? How?

  • I fail to see how this question is a duplicate of Number Tabs in Chrome or Firefox. That question asks how to put a tab index number on each tab for easy access using the Ctrl+Number shortcut; I am asking about finding the total count of currently open tabs in a window. The two are certainly related, but they are also quite different. – user Nov 11 '13 at 12:02

Consider to use Tab Counter Firefox add-on - the simplest one for the task.

  • 1
    That worked nicely, but I had to add it to the tab bar manually through the right-click menu -> customize (it didn't show up automatically/by default). – user Feb 17 '13 at 20:04
  • @MichaelKjörling glad to help) most addons do have customizable settings, no surprise here. – Peter L. Feb 17 '13 at 20:21
  • 1
    Indeed, but it did indicate in the description that the default was that it would be shown, so I was somewhat stumped for a while. – user Feb 17 '13 at 20:23

The answer above is outdated and that addon no longer exists. Use this addon instead : Open tab count resurrected


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