Firefox mobile: nav isn't responsive

[rsyring]

Loading Vue docs in Firefox mobile on a Pixel 5 doesn't seem responsive. No hamburger icon and nav is fixed width:

Chrome looks fine:

[Zykkl]

This issue was fixed in vuejs/docs#1217 quite some time ago. You can check if you still have the issue, I couldn't reproduce it myself.
(Late on the issue but imo every small contribution helps 😄 )