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Note that this key is not supported by Blink-based browsers (Google Chrome and Opera).

Type Object
Mandatory No (and only supported in Gecko). Mandatory before Firefox 48.
Example
"gecko": {
  "id": "[email protected]",
  "strict_min_version": "42.0",
  "strict_max_version": "50.*",
  "update_url": "https://example.com/updates.json"
}

The applications key contains keys that are specific to a particular host application.

Currently this contains just one key, gecko, which may contain four string attributes:

  • id is the extension ID. Optional from Firefox 48, mandatory before Firefox 48. See WebExtensions and the Add-on ID to see when you need to specify an add-on ID.
  • strict_min_version: minimum version of Gecko to support. Versions containing a "*" are not valid in this field. Defaults to "42a1". Requires Gecko 45
  • strict_max_version: maximum version of Gecko to support. Defaults to "*". Requires Gecko 45
  • update_url is a link to an add-on update manifest. Note that the link must begin with "https". Requires Gecko 45

Chrome incompatibilities

You can't use this key in Chrome extensions.

Examples

Example with all possible keys.

"applications": {
  "gecko": {
    "id": "[email protected]",
    "strict_min_version": "42.0",
    "strict_max_version": "50.*",
    "update_url": "https://example.com/updates.json"
  }
}

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