you think it would be possible to understand any Web browser that works with HTML5?
If by works with HTML5 you mean completely implement the standard you might be correct. WWW is marvelously byzantine, its fleshy walls are stuffed to the brim with the bubbling puss of arbitrary abstractions which disregard their domain, covered in sores of text based protocols leaking just enough of the puss to keep it from overflowing as it constantly makes more. Arms protrude from its sides grasping for whatever they can subsuming users when they get close as blistered mouths with missing teeth scream in agony, “coders” building their miserable fleshy houses in the puss.