Use your gmail account for storing your files easily with a kind of ftp manager for gmail

Step 2 Get the extension

Once you've got firefox you can download the extension. You have to open firefox and then download it.

So, open this window in firefox, then go to this site: https://addons.mozilla.org/firefox/1593/ . Then click the download button. If everything is allright there will pop up a window, you'll have to wait 4 seconds and then click install. The extension will be installed and then you'll have to restart firefox.