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    "source": {
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      "overlay": "https://updates.ultimity.app/browser/Ultimity-2026.9.24.2-source-overlay.tar.gz",
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    }
  },
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      "overlay": "https://updates.ultimity.app/browser/Ultimity-2026.9.25.1-source-overlay.tar.gz",
      "firefox": "https://archive.mozilla.org/pub/firefox/releases/153.3.0esr/source/firefox-153.3.0esr.source.tar.xz"
    }
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]