Enables extensions to interact with the browser's download manager. You can use this API module to download files, cancel, pause, resume downloads, and show downloaded files in the file manager.

To use this API you need to have the "downloads" API permission specified in your manifest.json file.

Types

downloads.FilenameConflictAction
Defines options for what to do if the name of a downloaded file conflicts with an existing file.
downloads.InterruptReason
Defines a set of possible reasons why a download was interrupted.
downloads.DangerType
Defines a set of common warnings of possible dangers associated with downloadable files.
downloads.State
Defines different states that a current download can be in.
downloads.DownloadItem
Represents a downloaded file.
downloads.StringDelta
Represents the difference between two strings.
downloads.DoubleDelta
Represents the difference between two doubles.
downloads.BooleanDelta
Represents the difference between two booleans.
downloads.DownloadTime
Represents the time a download took to complete.
downloads.DownloadQuery
Defines a set of parameters that can be used to search the downloads manager for a specific set of downloads.

Functions

downloads.download()
Downloads a file, given its URL and other optional preferences.
downloads.search()
Queries the DownloadItems available in the browser's downloads manager, and returns those that match the specified search criteria.
downloads.pause()
Pauses a download.
downloads.resume()
Resumes a paused download.
downloads.cancel()
Cancels a download.
downloads.getFileIcon()
Retrieves an icon for the specified download.
downloads.open()
Opens the downloaded file with its associated application.
downloads.show()
Opens the platform's file manager application to show the downloaded file in its containing folder.
downloads.showDefaultFolder()
Opens the platform's file manager application to show the default downloads folder.
downloads.erase()
Erases matching DownloadItems from the browser's download history, without deleting the downloaded files from disk.
downloads.removeFile()
Removes a downloaded file from disk, but not from the browser's download history.
downloads.acceptDanger()
Prompts the user to accept or cancel a dangerous download.
downloads.drag()
Initiates dragging the downloaded file to another application.
downloads.setShelfEnabled()
Enables or disables the gray shelf at the bottom of every window associated with the current browser profile. The shelf will be disabled as long as at least one extension has disabled it.

Events

downloads.onCreated
Fires with the DownloadItem object when a download begins.
downloads.onErased
Fires with the downloadId when a download is erased from history.
downloads.onChanged
When any of a DownloadItem's properties except bytesReceived changes, this event fires with the downloadId and an object containing the properties that changed.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxOperaFirefox for Android
BooleanDeltaChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
DangerTypeChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
DoubleDeltaChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
DownloadQueryChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
DownloadTimeChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
FilenameConflictActionChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
InterruptReasonChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
StateChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
StringDeltaChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
acceptDangerChrome Full support YesEdge No support NoFirefox No support NoOpera Full support YesFirefox Android No support No
cancelChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
downloadChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
dragChrome Full support YesEdge No support NoFirefox No support NoOpera Full support YesFirefox Android No support No
eraseChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
getFileIconChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android No support No
onChangedChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
onCreatedChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
onErasedChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
openChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
pauseChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
removeFileChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
resumeChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
searchChrome Full support YesEdge No support NoFirefox Full support 47Opera Full support YesFirefox Android Full support 48
setShelfEnabledChrome Full support YesEdge No support NoFirefox No support NoOpera Full support YesFirefox Android No support No
showChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48
showDefaultFolderChrome Full support YesEdge No support NoFirefox Full support 48Opera Full support YesFirefox Android Full support 48

Legend

Full support  
Full support
No support  
No support

Example extensions

Acknowledgements

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

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

Contributors to this page: wbamberg, andrewtruongmoz, chrisdavidmills
Last updated by: wbamberg,