This worked perfectly and i loved it, then i stupidly disabled it and it wouldn't work again, rightclick just got the usual submenu 'open in new tab, open in new container tab (what's one of those?) etc', and i've deleted my old profile and reinstalled all my addons, reinstalled, disabled enabled, everything, and still the same. So it would be a clear 6/5 but i went and ruined it, let me be a warning to others! Well i now managed to disabled container tabs, but it said it was already disabled, but before that option kept coming up. Anyway, i'm not disabling it ever again like i used to the old firefox version :)