I usually open link google in the same tab when i clicked it. but now it always open on new tab, i tried -browser.link.open_newwindow / 1 -browser.link.open_newwindow.restriction / 0 -browser.link.open_newwindow.override.external / 3 '''And its work''', '''but when i open external link on whatsapp web''', it doing the same like open link on google '''(open in the same tab)''', before this error happen, whatsapp web was always open the new tab for external link. How can i set for '''google opening link on the same tab''', and '''whatsapp web can open external link on the new tab'''?