Validation failure: Mandatory data_collection_permissions in MV3 rejected by versioning logic

[Seeaann13]

​Problem Description
Currently, the linter enforces the data_collection_permissions property for Manifest V3 extensions. However, it simultaneously triggers a warning/error stating that this key is not supported until Firefox 140, while MV3 requires strict_min_version: 115.
​Actual Behavior
Even when providing documented values like policy_agreement or unlabeled, the linter returns:
"/browser_specific_settings/gecko/data_collection_permissions/required/0" must be equal to one of the allowed values.
​This creates a deadlock where the property is both "mandatory" and "unsupported/invalid" at the same time.
​Environment
​Manifest Version: 3
​Target: Firefox Android (strict_min_version: 115)
​Linter: addons-linter (web-based)
​Files to reproduce

manifest.json

[Rob--W]

Your manifest.json contains "unlabeled". The supported values are documented at https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/manifest.json/browser_specific_settings#data_collection_permissions :

  "browser_specific_settings": {
    "gecko": {
      "id": "...",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": ["unlabeled"]
      }
    }
  }

The warning messages about versions are technically correct, but not really relevant. We should and will improve the clarity of these.