Don't open new tab when middle clicking empty space (fix #1881)
Don't open new tab when middle clicking empty space (fix #1881)

Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber,Bionus/imgbrd-grabber