In the Safari app on the left side of the search field, then tap Manage Extensions. Select or deselect each extension to turn that extension on or off.
Extensions access the content of the websites you visit. You can change how much access you give each extension:
Tap on the left side of the search field, then tap the extension you want to give permissions to.
Choose how much access to give each extension.
Important: Check which extensions you have installed and make sure you are familiar with what they do.
Swipe down on the Home Screen, then search for the extension you want to remove.
Touch and hold the extension icon, tap Delete app, then follow the onscreen instructions.