As I have explained elsewhere in the responses, it is a matter of ”mental gymnastics”: using something through a web-browser entails two nested operations: firs

As I have explained elsewhere in the responses, it is a matter of ”mental gymnastics”: using something through a web-browser entails two nested operations: first switching to the browser and then browsing to the content (via URL, bookmark, or tab choice) whereas switching from one app to another is a flat hierarchy.