You can control whether or not users can access the Salesforce1 mobile browser app when they log in to Salesforce from a mobile browser. By default, the mobile browser app is turned on for your organization.

1. Go to Setup –> Mobile Administration –> Salesforce1 –> Settings.

2. Select Enable the Salesforce1 browser app to allow all users in your organization to access the app. Deselect this option to turn off access to the app.

3. Click Save.

Cheers!!!