It's an innovative approach from an organization that has often struggled against the forces of inertia. Rather than try to beat the might of Apple's ability to dictate the default browser on iOS, as well as the company's requirement that any other browser still use Safari's rendering engine as its core technology, Mozilla has taken a different tack: create the category of "second browser", and own that.

Firefox Focus is as stripped-down as a browser can be. The app boots straight in to a search bar, which searches Yahoo (only Yahoo - that can't be changed, likely due to the $375m Yahoo pays Firefox annually to be the default search engine on the main version of the browser) for anything you ask.

But at the same time as searching Yahoo, Focus also strips out as much as it possibly can that could track you or your browsing: no cookies, no ad trackers, no analytics trackers, no social trackers.