when i middle click on the tab bar to add a tab, it doesn't work. when i try to drag links and images to the tab bar to open them, it doesn't work. pls help

when i middle click on the tab bar to add a tab, it doesn't work. when i try to drag links and images to the tab bar to open them, it doesn't work. pls help

i have the numlock status off (off means the numpad shouldnt work) but the numpad still works on opera gx. i tried on other programs and numlock applies there.