Thank you for not left to die project ”Drag & DropZones”
Just activate e10s, and in about:performance tab you can see:
If you not use drag-and-drop function.
Nice idea searching with drag-and-drop, but low performance in e10s is killing.
Web Search Pro may currently be slowing down Firefox.
Full name: {8B8A525A-CFCA-44cf-81C3-3969E6CB96E0}.
Impact on framerate: 9/10 (10 alerts).
CPU usage: 5%.
System usage: 1%.
Blocking process calls: 5%.
Measure start: 24 seconds ago.
Processes: 13496 (parent)