Hi there, i just successively tested all installed plugins.
The effect is caused by
Name: Ecosia — The search engine that plants trees!
Location: ${PROFILE_EXTENSIONS}/{d04b0b40-3dab-4f0b-97a6-04ec3eddbfb0}.xpi
Status: enabled
Version 3.1.3
The bugreport can thus be closed.
Thanks
Harald
