The following table lists the features of the Flash Player and Adobe AIR releases. It also lists the documentation locations for each of the features.

Flash Player 15 and AIR 15 (Sep 09, 2014)

SWF version: 26

Feature Documentation
Browser Zoom Factor
drawViewPortToBitmapData for HiDPI image on Retina Display  API reference
Cross promotion of games Developer Network
Mobile Device as a Gamepad (Android only)  Usage
Halfmoon AOT as default packaging mode Developer Network

Flash Player 14 and AIR 14 (June 10, 2014)

SWF version: 25

Feature Documentation
Anisotropic Filtering   API reference
Android device as a Gamepad  Developer Network
Context3DTextureFormat API reference
Context3DProfile API reference

Flash Player 13 and AIR 13 (April 8, 2014)

SWF version: 24

Feature Documentation
Stage3D - Anti-Aliasing for Render texture   API reference
Game preview (Beta) Developer Network
ALL_BUT_MANDATORY_BREAK API reference

Flash Player 12 and AIR 4 (January 14, 2014)

SWF version: 23

Feature Documentation
Usage flag for VertexBuffer and IndexBuffer in Stage3D API reference
API reference
Creation of Context3D with Profile Array
API reference
GraphicsPath API reference
Accessing native resources with R.* mechanism Guide

Flash Player 11.9 and AIR 3.9 (October 8, 2013)

SWF version: 22

Feature Documentation
DRMLicenseRequestEvent API reference
 
DRMDeviceGroup
API reference
DRMDeviceGroupEvent API reference
DRMDeviceGroupErrorEvent API reference
DRMManager API reference
API reference
Workers for AIR Android API reference
NativeApplication API reference
XXHDPI icon support for AIR Android Guide

Flash Player 11.8 (July 9, 2013) and AIR 3.8 (July 24, 2013)

SWF version: 21

Feature Documentation
Stage3D baselineExtended profile API reference
Guide
 
recursive stop on MovieClip
API reference
Flash Player & AIR Desktop Game Pad Support Guide
Support for large textures (extendedBaseline, 4096) API reference
Rectangle texture API reference
API reference
DatagramSocket API reference
ServerSocket API reference
Substitute a redirected URL from a source URLRequest for part of the URL in a new URLRequest API reference
API reference

Flash Player 11.7 and Adobe AIR 3.7 (April 9, 2013)

SWF version: 20

Feature Documentation
SharedObject.preventBackup property API reference
Guide
 
forceCPURenderModeForDevices Guide
Remote hosting of SWF files in case of multiple SWFs Guide
Support for uploading 16-bit texture formats API reference
GameInput updates API references:
GameInputEvent
GameInputControl
GameInputDevice
GameInput
Android - Create captive runtime apps Usage

Flash Player 11.6 and Adobe AIR 3.6 (February 12, 2013)

SWF version: 19

Feature Documentation
Lossless video export from standalone and authplay.dll No documentation impact  
Support for flash.display.graphics.readGraphicsData() that returns a Vector of IGraphicsData API reference
Improve permissions UI related to full screen keyboard access No documentation impact
Prevent ActiveX Abuse in Office Documents Administration Guide
Support file access in cloud on Windows No documentation impact
Enhance multi-SWF support API reference
Migration certification for ANEs Guides:
Signing an updated version of an AIR application
ADT package command
RectangleTexture API reference
File API update so AIR apps conform to Apple data storage guidelines API reference
Separate sampler state for Stage3D API reference
Set device specific Retina Display resolution (iOS) Guides:
Setting desktop application properties
iOS Settings
 

Flash Player 11.5 and Adobe AIR 3.5 (November 6, 2012)

SWF version: 18

Feature Documentation
Shared ByteArray API references:
flash.concurrent.Condition
flash.concurrent.Mutex
Using worker for concurrency
 
Invoke Event enhancement (for openurl) API references:
InvokeEvent
InvokeEventReason
Guide
Packaging multiple libraries in an ANE (iOS) Guide
Debug stack trace in release builds of Flash Player API reference
Statically link DRM (Desktop only) API reference
Guide

Flash Player 11.4 and Adobe AIR 3.4 (August 21, 2012)

SWF version: 17

Feature Documentation
Concurrency (ActionScript workers)
Guide
API references:
Worker
WorkerDomain
WorkerState
Telemetry API
API reference
Flash Player SandboxBridge support
API reference
StageVideo.attachCamera() improvements
Guide
API references:
attachCamera()
Camera.drawToBitmapData()
VIDEO_FRAME event
List connected devices
Command syntax
New location for the iOS Debug Bridge (idb) utility
Guide
Compressed texture with alpha support for Stage3D
Guide
API references:
Context3D.requestContext3D() Context3DTextureFormat
CubeTexture uploadFromBitmapData() and uploadFromByteArray()
Direct AIR Deployment for iOS
Guide
API reference
AudioPlaybackMode.AMBIENT
Guide
API reference
Resolve ANE Symbol Conflicts on iOS
Guides:
ADT
ANE
iOS Push Notifications
Guide
API references:
flash.notifications package flash.events.RemoteNotificationEvent
LZMA Support for ByteArray
Guide
API reference
Increase GPU Reach
API reference

Flash Player 11.3 and Adobe AIR 3.3 (June 8, 2012)

SWF version 16

Feature Documentation
Full screen keyboard input
Guide
API reference
Texture Streaming
Guide
API reference
BitmapData.drawWithQuality
Guide
API reference
BitmapData.encode
Guide
API reference
HW Failure String in Context3D.driverinfo
API reference
Aspect Ratio Enhancements
Guide
API reference
USB Debugging for AIR iOS
Guide
Enhanced Background Behavior for AIR iOS
Guide
Test and Debug Simulator Support
Guide
JPEG-XR Support
API reference
New location for File.applicationStorageDirectory (Mac OS only) API reference

Flash Player 11.2 and Adobe AIR 3.2 (March 28, 2012)

SWF version 15

Feature Documentation
Stage3D for Adobe AIR
Guide
API reference
 
Silent Auto Update for Windows
Guide
Multithread Video Decoding
API reference
Mouse Lock
Guide
API reference

Flash Player 11 and Adobe AIR 3 (October 4, 2011)

SWF version 13

Feature Documentation
Stage 3D Accelerated Graphics Rendering
Guide
API reference
Flash Access Content Protection Enhancements
Guide
Protected HTTP Dynamic Streaming (HDS)
Guide
NetStream.dispose()
API reference
H.264/AVC Software Encoding for Cameras (desktop)
API reference
Enhanced High Resolution Bitmap Support API reference
High Efficiency SWF Compression Support
Release notes
G.711 Audio Compression for Telephony API reference
Native JSON (JavaScript Object Notation) Support
Guide
API reference
Garbage Collection Advice Guide
API reference
Cubic Bezier Curves API reference
Secure Random Number Generator
API reference
Socket Progress Events
API reference
DisplayObjectContainer.removeChildren and MovieClip.isPlaying Guide
API reference
MovieClip.isPlaying
API reference
Sound.loadCompressedDataFromByteArray API reference
Sound.loadPCMFromByteArray
API reference
Native 64-bit Support
Release notes
Asynchronous Bitmap Decoding Guide
API reference
TLS Secure Sockets Support
Guide
API reference
Native Extensions Guide
API reference
Flash Access Content Protection Support for AIR Mobile Guide
Encrypted Local Storage for Mobile
Guide
API reference
Captive Runtime Support Guide
Stage Video Hardware Acceleration (AIR Mobile) API reference
H.264/AAC Playback Support (AIR for iOS) Guide
API reference
Front-facing Camera Support (AIR for Android) Guide
API reference
Background Audio Playback Support (AIR for iOS)
Guide
Device Speaker Control for Mobile (AIR for iOS & Android) API reference
16 and 32-bit Color Depth Release notes
Game Controller API (AIR TV)

Guide
API reference
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