That's it then. I've filed the bug. Thanks Richard!
>
> Hi,
>
> Today, as Nightly version changed, I saw that this page is not
> localized
> to 'eo':
>
>
https://www.mozilla.org/en-US/firefox/58.0a1/whatsnew/
> <
https://www.mozilla.org/en-US/firefox/58.0a1/whatsnew/>
>
> I translated it directly in git and now it shows in Pontoon, but
> now I'm
> wondering if there are other pages we might be missing...
>
> I also noted that firefox/nightly_firstrun.lang is present in 52
> locales
> while firefox_nightly_whatsnew.lang is only available in 26. For
> 'eo' at
> least, that meant the file was not available in Pontoon. I just
> checked
> 'it' and it is not in Pontoon either.
>
> Eduardo.
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