I am using the latest version of Firefox on W7 64 bit.
I tried reinstalling Firefox and it resolved the issue then shortly afterwards the problem popped up again. Reinstalling a 2nd time didn't fix the problem. Resetting Firefox didn't fix it either.
When you click Browse Folders to expand the dialog, what do you see? Empty space? I'm attaching my display on Windows 7.
All I see is empty space. I am positive there are folders in that location but I can't see them. I am attaching a screen capture of it.
That dialog is definitely broken. I'm struggling to think of what could have been fixed by one reinstall but not by another one.
Occasionally dialog problems can be caused by corruption in the file that stores your toolbar customizations. You can rename the file and return to default toolbar settings to see whether that makes any difference.
Open your current Firefox settings (AKA Firefox profile) folder using
Help > Troubleshooting Information > "Show Folder" button
Leaving that window open, switch back to Firefox and Exit (File menu > Exit or orange Firefox button > Exit)
Pause while Firefox finishes its cleanup, then rename localstore.rdf to something like localstore.old
Restart Firefox. Any improvement?
Try to delete the mimeTypes.rdf file in the Firefox profile folder to reset all file actions.
You can also check for problems with preferences.
Rename or delete the prefs.js file and possible numbered prefs-##.js and user.js files to reset all prefs to the default value.
Nothing has worked. I tried deleting the profile after uninstalling Firefox and then re-install it. The problem is still there.
Are any special options set on the Compatibility tab of your Firefox program icon? That would be the icon you use to start Firefox.
right-click > Properties > Compatibility tab
Typically all of the checkboxes are blank.
None of the boxes are checked.
Don't know if this is related to my problem but I can't see the folders when I do a "Save As..." in Oxygen Office Pro (enhanced version of Open Office) Writer.
Try saving a file in Safe Mode
Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.
(If you're not using it, switch to the Default theme.)
Once you get the pop-up, just select "'Start in Safe Mode"
If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.
To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.
When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.