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→Product Information Block
The product information block identifies the product and channel this MAR file applies to. It also includes the new version number to avoid downgrades.
4 bytes: Block separator {with a value of 0, 0, 0, 0} (To disambiguate from the INDEX block) 4 bytes: Block identifierwith a value of 1
4 bytes: Block size (Z)
<64 bytes: Application ID (such as from MOZ_APP_ID) Example: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
