Google Chrome
Step 1：Click the “More” icon here, then select “More tools” and “Clear browsing data” in turn.
Step 2: Then you will see this popup windows about clearing browsing data. Choose the time range on the top and then select the data you want to clear.
Step 3: After you choose the data, click “Clear data” button to clear them.
Firefox
Step 1: Click the “More” button and select Settings
Step 2: Select the “Privacy & Security” to go to the privacy page. Click the “Clear Data” button under the Cookies and Site Data section.
Step 3: Choose the data you want to clear, and then click “Clear” button to remove the unwanted data.