I have verified this issue using Firefox Release 97.0 fr, de, ar, zh-CN, RU, es-ES locales (Build ID: 20220202182137) on Windows 10 x64, macOS 11.6, and Linux Mint 20.2. - The “More from Mozilla” strings are localized.
Bug 1744466 Comment 13 Edit History
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I have verified this enhancement using Firefox Release 97.0 fr, de, ar, zh-CN, RU, es-ES locales (Build ID: 20220202182137) on Windows 10 x64, macOS 11.6, and Linux Mint 20.2. - The “More from Mozilla” strings are localized.