The very first link (Firefox OS) does not respect page localization and is alway to en-US site version. Changing it to http://www.mozilla.org/firefox/os/ may be good solution. See bug URL.
Seems it's not just one page issue - here it's too. https://marketplace-dev.allizom.org/developers/docs/dev_tools?lang=cs
Fixed: https://github.com/mozilla/zamboni/commit/5f45b707e01018923ce0153c121ca28f7ec19875 https://github.com/mozilla/zamboni/commit/75609a7911e814babb3a2fa6ea2dbec7c5167d5b
Status: UNCONFIRMED → RESOLVED
Last Resolved: 5 years ago
Resolution: --- → FIXED
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