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akken ad turareḍ amasal n tvidyut %s, tesriḍ ad tesbeddeḍ aseγẓan nniḍen microsoft, wali https://support.mozilla.org/kb/fix-video-audio-problems-firefox-windows
to play video formats %s, you need to install extra microsoft software, see https://support.mozilla.org/kb/fix-video-audio-problems-firefox-windows