How to remove cookies from FireFox
Delete cookies for a single site
To delete cookies for one site:
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Click the menu button and choose Preferences.
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Select the Privacy panel.
- Set Firefox will: to Use custom settings for history.
- Click Show Cookies.... The Cookies window will appear.
- In the Search: field, type the name of the site whose cookies you want to remove. The cookies that match your search will be displayed.
- Select the cookie(s) in the list to remove and click Remove Selected.
- Select the first cookie and press Shift+End to select all the cookies in the list.
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Click Close to close the Cookies window. Close the about:preferences page.
- Restart FireFox