Hi Daniel,
Let's continue. You said that you don't have the same problem with Safari or Chrome, but how about Internet Explorer?
My instructor has come across this problem before and a fresh install of FF was the only thing that corrected it. But we can try the following things first:
Step-1.Disable the Add-ons in FireFoxYou have a lot of add-ons installed in FireFox. Sometime some of them cause FF to have a problem. We need to check that.
Close any open Firefox windows and Start Firefox in Safe Mode. To do that:
- Clidk Start > Run
- In the Run box type firefox -safe-mode and click OK

- In the Firefox Safe Mode Window, click the box beside the following:
- Disable all add-ons: Disables all Firefox Add-ons

- Click on Make Changes and Restart.
See if FireFox still has the uploading problem. If the problem is still there, go directly to step 2. If the problem goes away, one or more of the add-ons is the culprit. To find out which add-ons are causing the problem,
- Click Tools at the top of the page and click Options on the drop down menu.
- On the Options page click the General option at the top of the page and then click Manage Add-ons... on the bottom of that page.
- On the Add-ons page click the Extensions icon at the top of the page.
- Click the first add-on in the list and click the Enable button.
Then restart FireFox and see if the problem comes back. If it does, that add-on is causing a problem and you should uninstall it using the
Uninstall button on the add-on.
Restart FireFox after checking each add-on and repeat numbers 1 thru 4 above until you have found and uninstalled all add-on(s) causing the problem.
If that didn't solve the problem go to the next step.
Step-2.Check the FF Connection Settings- Open FireFox.
- Click Tools at the top of the window and click Options on the drop down menu.
- On the Options page click the Advanced icon.
- Click the Network tab and click the Settings button in the Connection box.
- Op the Connection Settings page make sure that the only radio button that is ticked is the one beside Use System Proxy Settings
If that button was the only one with a tick in it go on to the next step. If you had to change the settings, restart Firefox and see if that corrected the problem. If it didn't, go to the next step.
Step-3.Reset FireFox Defaults- Click Start > Run
- In the Run box type firefox -safe-mode and click OK

- Choose what you want to be brought back to its original settings by checking the following options:

Click the box beside:- Reset toolbars and controls: Removes any made toolbar customization.
- Reset all user preferences to Firefox defaults: Restores the default Options and preference settings and resets the default theme. It also changes back to default all the entries in the about:config page.
- Restore default search engines: Adds back all of the default search engines (Google, Yahoo, eBay, Creative Commons, Answers.com, and Amazon.com) , without removing any added search engines.
- Click on Make Changes and Restart.
If that didn't solve the problem we are down to updating FF to the most recent version. The version you are using now is 3.6.28. The most current version is FireFox 11.
Step-4.Things For Your Next Post:1. Let me know if any of the options corrected the problem with FireFox
2. Do you have the same problem in Internet Explorer?
Edited by godawgs, 19 April 2012 - 03:01 PM.