A full cache can slow down your browser. Be sure to empty it regularly.

• Select 'General' tab
• Click on 'Delete Files' from the 'Temporary Internet Files' section. Check the box 'Delete all offline content' and click OK. Wait for the hourglass icon to stop after it deletes the temporary internet files. This will clear your browser's memory and may speed up your session.
• Click on 'Delete Cookies' from the 'Temporary Internet Files' section. Cookies are text files that are automatically downloaded to your hard drive by Web sites to make Web browsing easier.
• Click on 'Clear History' from the History section.