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Firefox 4, how to avoid disapearing of "app tabs" on exit (in situation where the last Firefox window closed has no app tabs on it).

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It happens when: - you have 1 FF window opened (with "app tabs" that you carefully selected) - you open any URL in 2nd window - you close 1st window (with "apps tabs") - you close 2nd window (what closes FF) - you start FF again At this point, FF opens window _without_ "apps tabs"

It happens when: - you have 1 FF window opened (with "app tabs" that you carefully selected) - you open any URL in 2nd window - you close 1st window (with "apps tabs") - you close 2nd window (what closes FF) - you start FF again At this point, FF opens window _without_ "apps tabs"

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App tabs and Tab Groups (Panorama) are stored as part of the session data in the file sessionstore.js in the Firefox Profile Folder

Make sure that you do not use Delete browsing, search and download history on Firefox to clear the "Browsing History" if Firefox is closed.