feat: update translation

files/zh-cn/mozilla/add-ons/webextensions/api/extensiontypes/imageformat/index.md

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+---
+title: extensionTypes.ImageFormat
+slug: Mozilla/Add-ons/WebExtensions/API/extensionTypes/ImageFormat
+l10n:
+    sourceCommit: a16fecbf75f71fc11e03ef6cd0b0c34ad6f3d480
+---
+
+{{AddonSidebar}}
+
+图片的格式。
+
+## 类型
+
+该类型的取值是字符串，可能取值包括 `"jpeg"`、`"png"`。
+
+## 浏览器兼容性
+
+{{Compat}}
+
+{{WebExtExamples}}
+
+> [!NOTE]
+> 此 API 基于 Chromium 的 [`chrome.extensionTypes`](https://developer.chrome.com/docs/extensions/reference/extensionTypes/#type-ImageFormat) API。该文档衍生自 Chromium 代码中的 [`extension_types.json`](https://chromium.googlesource.com/chromium/src/+/master/extensions/common/api/extension_types.json)。
+
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