I was using firefox and everything was going well, owever I tried to download a slackbuild and noticed it wouldn't save to Downloads. However, if I choose Pictures it saves it just fine. The only thing I can think of is that I changed download mirrors due to poor download speed for upgrades in /etc/slackpk/mirrors and reinstalled firefox because I was receiving a bad md5sum error.

I would move ~/.mozilla to ~/.mozilla~ and try to start fresh to see if that fixes the problem. If not then maybe firefox has a problem you could again try to reinstall with slackpkg.

I moved firefox and received this error when trying it again.

/home/pino/Downloads/SlackBuilds.org - skype.org%20-%20skype could not be saved, because you cannot change the contents of that folder.

Change the folder properties and try again, or try saving in a different location.

That sounds like a permissions error...do you own that directory or have write permissions to it?

Yes I was able to save files to it, and then all of a sudden I wasn't allowed. I'm guessing a permission was changed somehow?

Could you post the output of:

total 120
drwx--x--x 24 pino users 4096 Jun 7 18:23 .
drwxr-xr-x 5 root root 4096 Jun 6 20:09 ..
-rw------- 1 pino users 306 Jun 7 17:38 .ICEauthority
-rw------- 1 pino users 49 Jun 7 17:38 .Xauthority
-rw------- 1 pino users 3632 Jun 7 18:24 .bash_history
drwxr-xr-x 6 pino users 4096 Jun 7 17:48 .cache
drwxr-xr-x 7 pino users 4096 Jun 6 20:45 .config
drwx------ 3 pino users 4096 Jun 6 20:17 .dbus
drwxr-xr-x 5 pino users 4096 Jun 6 21:10 .eboard
drwx------ 2 pino users 4096 Jun 6 21:49 .emacs.d
drwx------ 3 pino users 4096 Jun 6 20:17 .gnupg
drwxr-xr-x 2 pino users 4096 Jun 6 20:17 .gstreamer-0.10
dr-x------ 2 pino users 0 Jun 7 17:38 .gvfs
drwxr----- 2 pino users 4096 Jun 6 22:13 .hplip
drwxr-xr-x 3 pino users 4096 Jun 6 20:17 .local
drwx------ 4 pino users 4096 Jun 7 18:24 .mozilla
drwx------ 4 pino users 4096 Jun 6 20:19 .mozzila~
-rw-r--r-- 1 pino users 3729 May 16 2013 .screenrc
-rw------- 1 pino users 49 Jun 7 17:38 .serverauth.821
drwx------ 3 pino users 4096 Jun 7 06:44 .thunderbird
-rw-r--r-- 1 pino users 6095 Jun 6 21:24 .xboardrc
drwxr-xr-x 2 pino users 4096 Jun 6 21:13 .xine
drwxr-xr-x 4 pino users 4096 Jun 7 17:40 Desktop
drwxr-xr-x 2 pino users 4096 Jun 6 20:17 Documents
drwxr-xr-x 3 root root 4096 Jun 6 22:09 Downloads
drwxr-xr-x 2 pino users 4096 Jun 6 20:17 Music
drwxr-xr-x 4 pino users 4096 Jun 6 22:03 Pictures
drwxr-xr-x 2 pino users 4096 Jun 6 20:17 Public
drwxr-xr-x 2 pino users 4096 Jun 6 20:17 Templates
drwxr-xr-x 2 pino users 4096 Jun 6 20:17 Videos

There's your problem. Root owns your 'Downloads' directory. To fix:

That fixed it. Although it would be nice to know what the cause was in the first place.

You probably ran a command with sudo, and that command manipulated your Downloads directory. That would change the permissions of the directory to the root user.

Just a general tip: try to aviod using 'sudo' or logging in as root unless you need to (like installing packages, or editing a config file).

Yep. Always run your box as a regular user. Running as root is a bad idea.