Step 1 : Go to this location:
Windows: C:\ProgramFiles\MozillaFirefox\Components\For Ubuntu, change the "3.6.15" part with your firefox version.
Step 2. Make sure that Mozilla Firefox is closed. If you are using Windows, you can double check this by going to the task manager, then end the process named firefox.exe if it exists.
Step 3. Now, open the file "nsloginmanagerprompter.js" from the directory that you have opened earlier. You can user Notepad or Wordpad to open it.
For Ubuntu users, you might need administrative privileges to edit the file. Open a terminal, type
sudo cp /usr/lib/firefox-3.6.15/components/nsloginmanagerprompter.js Desktop
Step 4. Navigate to lines 804 to 869, and replace them with the following code:
var pwmgr = this._pwmgr;
Save the file. For Ubuntu users, open a terminal then type
sudo cp nsloginmanagerprompter.js /usr/lib/firefox-3.6.15/components/
This will copy the file you have edited to the original location.
Step 5. Make sure it works by trying it on yourself. If it works, you should see your username and password when you open
Tools > Options > Security > Saved PasswordsIf you could not see anything, make sure you followed the steps correctly.