Fix login issues on websites that require a username and password
If you find that you can't log in to a website that requires a username and password, follow the steps described in this article.
If you can log in to a website manually, but can't save or use saved usernames and passwords, see Usernames and passwords are not saved.
Table of Contents
Enable cookies for the website
Clear history for that site
Clear all cookies and the cache
Check Extensions and Plugins
Security application is blocking cookies
Remove corrupt cookies file
Enable cookies for the website
Make sure that Cookies - Information that websites store on your computer are enabled for the site in question:
At the top of the Firefox window, click on the Tools menu and then select Options
Select the Privacy panel.
Set Firefox will: to Use custom settings for history. Custom History Fx 5 - Win
Make sure Accept cookies from sites is selected.
Make sure Accept third party cookies is selected.
Disable third-party cookies in Firefox to stop some types of tracking by advertisers can cause problems with some websites. Enable this setting to rule it out as a cause for your problem.
Click Exceptions....
Make sure the site you're trying to access isn't listed.
If it is listed, click on its entry, then click Remove Site.
If you changed any settings, try logging in to the site again.
Clear history for that site
The cookies and temporary data already stored on your computer may be causing the problem. Delete them, then test for your problem:
At the top of the Firefox window, click the History menu and select Show All History to open the Library window.
At the top right corner, type the name of the website you wish to forget in the Search History field, and press Enter.
In the resulting list, right-click on the site you wish to forget, and select Forget About This Site. History Win6
Close the Library window.
Clear all cookies and the cache
If deleting cookies for the site with the problem did not fix the error, clear all the cookies stored on your computer and clear the Firefox cache:
At the top of the Firefox window, click on the Tools menu, and select Clear Recent History....
In the Time Range to clear: drop-down, select Everything.
Click the arrow next to Details to display the list of items that can be cleared.
Select both Cookies and Cache.
Click Clear Now.
Check Extensions and Plugins
Some extensions can cause problems with logging in to websites, especially extensions associated with certain websites. For example:
If you can't log in to Yahoo! and you use a Yahoo! Toolbar extension, try disabling it using the instructions in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article, restarting Firefox and then following the steps above to clear cookies and cache again.
If you can't log in to Gmail and you use a Google extension, try disabling it and then following the above steps to clear cookies and cache before trying to log in again.
Other extensions may also cause login problems. To determine if they are the cause, see: Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems.
Some plugins can also cause problems logging in to websites. See the Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems article for instructions on how to determine whether a plugin is causing your problem.
Security application is blocking cookies
Some Internet security and privacy applications have features that block cookies. Check the documentation that came with your software or visit the software provider's support site, to see if your application includes a cookie control feature and how you can change those settings.
http://support.mozilla.org/en-US/kb/fix ... -passwords
