Windows 10: .jfif, .oga, .ogv extensions on Windows 10

I've just hit the same as https://answers.microsoft.com/en-us/windows/forum/all/jpg-vs-jfif-extension/f66875d7-4780-4d55-b8da-9387de4139d4, and checked HKEY_CURRENT_USER\SOFTWARE\Classes\MIME\Database\Content Type against the same path under HKEY_LOCAL_MACHINE.


HKEY_LOCAL_MACHINE has the expected values, but for some reason, some opinionated app has overridden not just image/jpeg but also audio/ogg and video/ogg to .oga and .ogv. There's also an entry overriding application/x-compressed to .solitairetheme8, but I don't see what business that would have in touching other filetypes. None of these are standard extensions, and they frequently aren't recognised when uploading to websites.


As far as I know, I haven't installed any media applications that might have done this, but I can see that my downloads flipped from .jpg to .jfif on the same day I installed Dropbox and Java JRE, so these are likely culprits.


I can fix my profile, but I'd really like to get some code changed to prevent it happening in the future. Has anyone dug into this any further?



Cheers,

Mark

:)

 

.jpg vs .jfif extension

In the last few months, every windows update changes the registry setting for saving jpeg images from .jpg to .jfif. Why is this continually changing even after I change the registry setting back to .jpg?

As a side note, the image I am saving is NOT a .jfif file and I do not have the option to save as a .jpg from the file save window. Only after changing the registry setting back to .jpg am I able to save with a .jpg extension.

 

.jpg vs .jfif extension

These are being saved from a web page and Microsoft edge browser.

However saving the file is not what is changing the registry setting. The following setting is what is being changed after an update to windows

Computer\HKEY_CLASSES_ROOT\MIME\Database\Content Type\image/jpeg

A search of the registry finds several .jfif entries but setting the one referenced above allows the image to be saved with the .jpg extension as it did in the past.

 

Allow open file standard attachments

Borrowing this list from Wikia: svg, odt, ods, odp, odg, odc, odf, odi, odm, ogg, ogv, oga

svg = Scale Vector Graphic
odt = Open Document Text
ods = Open Document Spreadsheet
odp = Open Document Presentation
odg = Open Document Graphics
odf = Open Document Formula
odi = Open Document Image
odm = Open Document Master
ogg = Ogg Vorbis
ogv = Ogg Vorbis Video
oga = Ogg Vorbis Audio