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To clear the cache in Firefox Browser, click the settings icon in the top right-hand corner of the page to access the browser’s settings.
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From the drop-down list, select the Manage more settings option.
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On the next page, select the General hyperlink.
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Scroll down to the Network Settings section, which is at the bottom of the page and select the Settings button.
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On the Connection Settings, check the Do not prompt for authentication if the password is saved to prevent Firefox from rendering bad pages.
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