You can set permissions for a site without changing your default settings.
Change settings for all sites
- On your iPhone or iPad, open the Chrome app
.
- Tap More
Settings
.
- Tap Content settings.
- Tap the permission that you want to update.
.
Settings 
.Permissions that can be changed
- Block pop-ups: By default, pop-ups are blocked. Learn how to manage pop-ups.
- Default apps: Choose the app that you want to use to open email links.
- Default site view: On your device, you can tell Chrome to request and display a site’s mobile or desktop version.