GNOME extension that improves the Activities Overview:

• removes the desktop (wallpaper)
• hides dash and panel
• blacklist for excluding certain applications from the overview
• pre-selects a window so that keyboard navigation is possible right away
  • default: window that currently has focus
  • fallback: previously active window
• replaces scaling animation (on hover / focus) with a simple outline
• captions are visible all the time
• slightly faster animations

before:

after: