Enabling Firefox 4.0 to query to Save open tabs

Up until Firefox v3.6, closing a window with multiple tabs open, a query asking to Save the tabs was shown. In Firefox 4.0 this isn’t the case. I found this feature quite useful. Getting this back is quite simple. This is what needs to be done.

1. Open a tab or a window and type about:config.
2. In the resulting window, search for each of the following in the filter bar: browser.warnOnRestart, browser.warnOnQuit, browser.tabs.warnOnClose, browser.showQuitWarning.
3. Toggle the values of all the above to true.

That’s it. Now on closing the window the familiar popup is shown.


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