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CFCA Security Application Development Kit 中国金融认证中心给中国银联商务定制的数字证书应用扩展程序，适用于最新版Google浏览器。中国银联商务业务系统集成该数字证书应用程序扩展，用户安装该数字证书应用程序扩展后，可在中国银联商务业务系统通过此证书应用程序扩展调用USBKEY里的X509数字证书实现获取证书信息（例如获取X509数字证书的证书主题DN、证书颁发者、序列号等证书信息）、电子签名相关业务功能。
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.