I got a message that I have reached the end of the BigPurplePhone world. What is this?

I got a message that I have reached the end of the BigPurplePhone world. What is this?

You have reached the edge of the BigPurplePhone world
The browser on BigPurplePhone SilverFox is limited so that the phone is safe from security threats, ads, pop ups, apps and trackers to provide safety for vulnerable people. This means there are many things you can't do on the BigPurplePhone browser such as the tasks below:
- Download files
- Upload files 
- You can't install applications
- You can't open apps from links on websites
- You can't share links