Cannot open some website,when try , then show this message"Sorry, we could not handle your previous request. Please refresh to try again." How to fix it?

<blockquote>Locking duplicate thread.<br>
Please continue here: [[/questions/946071]]</blockquote>
cannot open some website,when try , then show this message"Sorry, we could not handle your previous request. Please refresh to try again." How to fix it?

Try to update to the latest Firefox 17.0.x version.
*Help > About Firefox
See:
*https://support.mozilla.org/kb/update-firefox-latest-version
The Firefox 12.0 version that you currently run is no longer supported with security updates
You can create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
If the new profile works then you can transfer some files from an existing profile to the new profile, but be careful not to copy corrupted files.
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
Also make sure that your security software isn't blocking cookies or otherwise interfering.

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