Open Settings
Tap Safari
Tap Clear History and Website Data
Tap Clear History and Data to confirm
To clear website data without clearing history, go to Settings
Tap Safari
Tap Advanced
Tap Website Data
Tap Remove All Website Data
To clear cache for Chrome, open Chrome
Tap the three dots
Tap History
Tap Clear Browsing Data
Select Cookies, Site Data and Cached Images and Files
Tap Clear Browsing Data
To clear cache for Firefox, open Firefox
Tap the menu button
Tap Settings
Tap Data Management
Turn on Cache and Cookies
Tap Clear Private Data
To clear cache for other apps, delete and reinstall the app if needed