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Firefox does not add file extension on files when saving

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  • 5 have this problem
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  • Last reply by sunfish62

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When I ask to save a file, the save dialog box in Firefox deletes the file extension (e.g., "doc", "pdf", "ofx") from the filename, and I must manually add it back. Prior versions did not behave this way.

Chosen solution

You can try to delete the mimeTypes.rdf file in the Firefox Profile Folder.

  • Help > Troubleshooting Information > Profile Directory: Open Containing Folder
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Chosen Solution

You can try to delete the mimeTypes.rdf file in the Firefox Profile Folder.

  • Help > Troubleshooting Information > Profile Directory: Open Containing Folder
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Um.. No. Didn't work. Unfortunately. But thanks.