Context menu for opening a link from the article has bad UX on touchscreen
When an article contains a link, opening it via long tap and selecting from drop-down menu requires holding after the long tap and sliding a finger to the menu option - which means the option's text is hidden by the sliding finger and often the context menu disappears before the user selects any of its items.
Single tap and dialog with choices (and checbox "Always use this option without asking") would be simpler to use. Settings would also allow to change the selected option.