Pages with code samples don't shrink properly in Firefox thus making the pages unreadable on mobile

I use Firefox on Android as my main browser and every time I follow a link from Twitter to the React docs, I inevitably can't read them without then copying the link in to Chrome because body has overflow-x: hidden and the .gatsby-highlight code samples don't wrap like they do in other browsers.

An example, broken page is https://reactjs.org/docs/add-react-to-a-website.html

This issue can also be reproduced in desktop Firefox:

Personally, I don't think that code samples should wrap and they should have their own horizontal scroll, but I'll leave it up to you which you think is the best course of action. Regardless, I'd be happy to try and fix it, whichever solution you decide on.

先在 Android 或桌面版 Firefox 中重現範例頁面，然後檢查 body overflow-x 和 .gatsby-highlight 程式碼範例的樣式。完成的標準是文件頁面在行動裝置上仍保持可讀，且程式碼範例要麼換行，要麼提供自己的水平捲動。