Your system is infested with malware.

1. Open the Add-ons Manager (Ctrl+Shift+A; Mac: Command+Shift+A), Extension category.
2. Next to the following extensions, click the Remove button. Performance Cache 1.0 • SweetPacks 10.22.3.18. Also remove any other extensions you're not familiar with. In case of problems, see the following article.
   • Cannot remove an add-on (extension or theme)
3. Exit Firefox.
4. One by one, install and update the following anti-malware applications, then fully scan your system with them.
   • Troubleshoot Firefox issues caused by malware

As for the passwords issue,

1. Click the ≡ Menu Button and choose Options.
2. Click the Security tab.
3. Make sure "Remember passwords for sites" is checked.
4. Click the Exceptions button. If you have any sites listed there, click the Remove All button.
5. Close the options window.
6. Type about:config into the address bar and press Enter.
7. To bypass the warning, press the big button labeled "I'll be careful, I promise!".
8. In the search box, paste signon.overrideAutocomplete
9. In the search results, double-click signon.overrideAutocomplete to set its value to true.
10. Note that some sites instruct the browser not to automatically fill in certain form fields. On such sites, you have to either type the first letter of your user name, or double-click the user name field.

• 1

Many site issues can be caused by corrupt cookies or cache.

• Clear the Cache

Press the <Alt Key> to bring up the tool bar. Then; Tools > Options > Advanced > Network > Cached Web Content: Clear Now

and

• Remove Cookies

Press the <Alt Key> to bring up the tool bar. Then Tools > Options > Privacy. Under History, select Firefox will Use Custom Settings. There is a button on the right side called Show Cookies.

If there is still a problem, Start Firefox in Safe Mode {web link} While you are in safe mode; Press the <Alt Key> to bring up the tool bar. Then Tools > Options > Advanced > General. Look for and turn off Use Hardware Acceleration.

Poke around safe web sites and see if there is still a problem. Then restart

• 2

Press the <Alt Key> to bring up the tool bar. Then Options > Security. Under Passwords, select Remember. To check the passwords you have listed, press Saved Passwords.

Warning. There are some web pages that do not allow browsers to record or fill in the log-in information. But if you go to the Mozilla Add-ons Web Page {web link} (There’s a lot of good stuff here) you can find several add-ons that can override this, and give you better control of your password information.

One last thing. In the event that the passwords information is lost, you should record all information in a separate text file somewhere else on your hard drive. You can easily copy and paste if you need to do so. If you are concerned about someone else looking at that file, you can compress it using a password.