v0.15.6

Changed

• Live view: while connecting, the mascot sprints over hurdles (it jumps as each
  one reaches it); when something went wrong, the mascot looks sad (worried brows,
  a frown, a tear) instead of the warning sign. Still with reduced motion.

Fixed

• Firefox: a shared tab behind another tab of its window follows the window's
  size again. Firefox resizes only the tab in front, so after the window was made
  smaller and larger the live view stayed small until the tab was clicked; the
  extension now warms that tab up to its window's size (or, with nobody at that
  window, shows it for a moment) before capturing.