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Whenever I right click on an image on a web page and select 'Save image as...', the filename always ends with '.jpg.jpeg' instead of '.jpg'. How do I stop Firefox doing this? It doesn't happen when I try the same thing with Internet Explorer

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It hasn't done this since I first installed Firefox, only the last month or so. I've tried running in Firefox safe mode with all extensions disabled but this makes no difference. I've also found the following article: http://kb.mozillazine.org/File_types_and_download_actions ...that suggests reseting the browser.download.pluginOverrideTypes & plugin.disable_full_page_plugin_for_types entries in about:config but I don't have these entries so can't reset them

It hasn't done this since I first installed Firefox, only the last month or so. I've tried running in Firefox safe mode with all extensions disabled but this makes no difference. I've also found the following article: http://kb.mozillazine.org/File_types_and_download_actions ...that suggests reseting the '''browser.download.pluginOverrideTypes''' & '''plugin.disable_full_page_plugin_for_types''' entries in about:config but I don't have these entries so can't reset them

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Did you try to delete mimeTypes.rdf to reset all download actions?

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Hi, Thanks for your suggestion. I have tried deleting it now but after restarting Firefox, the same problem still exists...

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In that case you may need to look in the Windows registry with the registry editor (regedit.exe) to see if the problem is there.
You can do a search (Ctrl+F) for jpg after navigating to the HKCR\MIME\Database key.

HKEY_CLASSES_ROOT\MIME\Database\Content Type