It is a good idea to clear your browser's cache memory, if you have any of theses issues  :

• Slow running
• crashing browsers
• difficulty loading websites or features, outdated or incorrect information or images on some websites

It can help you as well : 

• Saves you from using old forms
• Protects your personal information
• Facilitates the operation of our applications on your computer

You can follow the process on this presentation to empty your cache : Clear the browser cache