Come up with new design paradigms. You can't tweak yourself out of local maxima.

I think it's more about, what will they be able to claim as an achievement on their resume. None of them want to say "kept the site majestically usable in the same way so that ever larger ecosystems started depending on it", even though that's what we want.

Design and implement the UX and UI for actual distinguishing features. Or improving the settings menus, the "customize" view, adding more tab management features (adjustable minimum tab width?), et alia.

Designers in charge of UX is how we got into this mess. We need more HCI researchers and fewer designers.

Work on fixing compatibility for safari on windows

People use Safari on anything other than Mac?

It used to work on Windows. They dropped support years ago.