index.md

---

title: downloads.InterruptReason
slug: Mozilla/Add-ons/WebExtensions/API/downloads/InterruptReason
page-type: webextension-api-type
tags:
  - API
  - Add-ons
  - Extensions
  - InterruptReason
  - Non-standard
  - Reference
  - Type
  - WebExtensions
  - downloads
browser-compat: webextensions.api.downloads.InterruptReason

---

{{AddonSidebar()}}

The InterruptReason type of the {{WebExtAPIRef("downloads")}} API defines a set of possible reasons why a download was interrupted.

A {{WebExtAPIRef('downloads.DownloadItem')}}'s error property will contain a string taken from the values defined in this type.

Type

Values of this type are strings. Possible values are split into categories, with each set having the same substring at the beginning:

File-related errors:

• "FILE_FAILED"

• "FILE_ACCESS_DENIED"

• "FILE_NO_SPACE"

• "FILE_NAME_TOO_LONG"

• "FILE_TOO_LARGE"

• "FILE_VIRUS_INFECTED"

• "FILE_TRANSIENT_ERROR"

• "FILE_BLOCKED"

• "FILE_SECURITY_CHECK_FAILED"

• "FILE_TOO_SHORT"

Network-related errors:

• "NETWORK_FAILED"

• "NETWORK_TIMEOUT"

• "NETWORK_DISCONNECTED"

• "NETWORK_SERVER_DOWN"

• "NETWORK_INVALID_REQUEST"

Server-related errors:

• "SERVER_FAILED"

• "SERVER_NO_RANGE"

• "SERVER_BAD_CONTENT"

• "SERVER_UNAUTHORIZED"

• "SERVER_CERT_PROBLEM"

• "SERVER_FORBIDDEN"

User-related errors:

• "USER_CANCELED"

• "USER_SHUTDOWN"

Miscellaneous:

• "CRASH"

Browser compatibility

{{Compat}}

{{WebExtExamples}}

Note: This API is based on Chromium's chrome.downloads API.