Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

can't set Firefox as default JPEG viewer

T.BugReporter
T.BugReporter
more options

When I double-click on a local JPEG file, I want it to load into Firefox. However, when I try to "Choose default program", Firefox isn't listed as an option. I can browse to firefox.exe in the dialog box, but doing so doesn't select it or add it to the list of options. Why is this? How can I force Windows to use Firefox as the default viewer?

When I double-click on a local JPEG file, I want it to load into Firefox. However, when I try to "Choose default program", Firefox isn't listed as an option. I can browse to firefox.exe in the dialog box, but doing so doesn't select it or add it to the list of options. Why is this? How can I force Windows to use Firefox as the default viewer?

All Replies (2)

Swarnava Sengupta
Swarnava Sengupta
  • Locale Leader
more options

Please download this 3 file first

run one by one and click yes when prompt and then try to open image

T.BugReporter
T.BugReporter Question owner
more options

Ok, I tried that and, for the record, it did nothing to fix my problem. Here's what did fix it: I did some digging through the registry, along with a lot of Googling, and found the entry that was causing the problem -

[HKEY_CLASSES_ROOT\Applications\firefox.exe\shell\open\command]

@="\"C:\\{the path to an old (and since uninstalled) version of}\\firefox.exe\" \"%1\""

It seems that many of these newer Windows features can't handle it when you try to keep more than one version of a program installed - or even if you install two unrelated programs that happen to have the same executable name. Once I pointed this entry to my current installation of Firefox, everything started working the way it should - although I shudder to think how confused it'd get if I were to install two different programs both called "example.exe". However, even though this is more of a Windows problem, you would think the Firefox installer would know to look for and correct errors like this.