Specially dedicated programs are responsible for launching a .extra file saved in a specific format (which we can recognize on the basis of the extension of a given file). The most common problems with .extra files downloaded or received via e-mail are: their incorrect association with programs in the registry, or simply the lack of an appropriate program to open them. To solve the problem with the .extra file it is usually sufficient just to download the appropriate software that supports .extra file format, which can be found in the table below. The most common file format with the .extra extension belongs to the category Document Files . Mozilla Corporation is responsible for creating .extra extension file.
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