Tapping the "Close" icon on any page to bring the Home page seems a little misleading as it doesn't seem to be doing what a user would consider it to do (close the page).

After tapping the "Close" icon when a user clicks the "Show tabs" icon and taps the current tab, he would get the article he just closed instead of the Home page.

If the Home page is shown whenever a new page is created (as described in T156801) the "Close" button would be unnecessary as the user could close the tab instead. Just for the note, in every browser I have used, I close a page in most cases by closing the tab.