Hello, go to a file that you want to open as adobe reader. Like a file right click on it, then you will see (open with) should see Adobe reader if not you will have to do it this way. Choose default program then browse now find your Adobe reader. I hope this helps!

If you set Firefox as the default browser and Firefox detects via a registry scan that there is currently no file handler application that handles PDF files and a few other file types then the Firefox updater/installer registers Firefox as the default application to handle these file types.

On Windows XP you can check the Windows Control Panel:

• Control Panel > Folder Options > File Types: .pdf
• Registry Editor:
  HKEY_CURRENT_USER\Software\Classes\.pdf\
  HKEY_CLASSES_ROOT\.pdf (Default= empty string)

Thank you corel.

Yes, I went to regedit and see FirefoxHTML under "default" in both entries.

How do I change this to Adobe?

Let me say here that this is ridiculous, why would Firefox do a registry scan and alter this? The default WAS Adobe Reader before. I see it also changed oga and ogg files too. Why would a browser app change anything other than html files?

Thank you.

I think that it is enough to edit the value and delete the current FirefoxHTML text, so you get an empty string value.

So when I right-click on them, I choose new "key", or "string value" or? there's no delete option.

Sorry I haven't messed with registry in a long while.

Thank you. I edited to show an empty string value which for some reason deleted the pdf extension from my Folder Options. I recreated it as a new extension with Adobe as the default program.

I have to say, that is one of the most bizarre situations I've seen, with a browser "taking liberties" so to speak.