How do you clear the cashe and clean the browser

Empty Caches

1. Safari > Preference > Advanced

Checkmark the box for "Show Develop menu in menu bar".

"Develop" menu will appear in the Safari menu bar.

Click Develop and select "Empty Caches" from the dropdown.

2. Quit Safari if open.

Option click the "Go" menu in the Finder menu bar.

Select "Library" and then "Caches".

Look for the folder 'com.apple.Safari"

Right click "com.apple.Safari" and select "Move to Trash"

Relaunch Safari.