I used to user the Chrome developertools, and then typed /one/one.app to see the Salesforce 1 view and I was able to select between different devices etc. This now doesn't work anymore, and I get the following error:
You can't access Lightning Experience
The page you're trying to access is available from the Salesforce1 mobile app only. Please try again from a supported mobile device. Need help? Ask your Salesforce admin.
Any ideas how I can fix this? Tia.