firefox mobile view breaking

[sadn1ck]

Viewport meta tag missing causing firefox mobile display issues

Issue was posted on 2.x docs vuejs/v2.vuejs.org#2855 about the 3.x docs, just mirroring it here.
Can confirm said behaviour, probably due to missing viewport tag in the head.

Fix

Just need to add

['meta', { name: 'viewport', content: 'width=device-width, initial-scale=1.0' }],

to the vuepress config under head (tried locally).

Let me know if can make a PR, thanks.

[NataliaTepluhina]

@sadn1ck thank you for reporting this! PRs are very welcome, would you mind creating one? 🙏🏻

[sadn1ck]

Done @NataliaTepluhina, you can have a look. Thanks!