Changing the language display of Mozilla Firefox 1-Select Tools > Options. 2-On the Content tab, under the Languages section click Choose. 3-From the Select a language to add menu, select a language. Click Add. 4-Set the language preference. Use the buttons to move the preference up or down. 5-Click OK.

Hello,

You can try to remove the Site Preferences via "Clear Recent History" or only remove the content-prefs.sqlite file to keep the permissions stored in permissions.sqlite.

• clearing "Site Preferences" clears exceptions for cookies, images, pop-up windows, and software installation and exception for password and other website specific data

You can use this button to go to the current Firefox profile folder:

• Help > Troubleshooting Information > Profile Directory:

Windows: Show Folder; Linux: Open Directory; Mac: Show in Finder

http://kb.mozillazine.org/Profile_folder_-_Firefox

Hope it helps. Thank You.