- Fixed iframe extension causing entire app to crash - Additional security fixes

- Significantly improved performance: projects are now 1.37x as fast on average, and many projects are over twice as fast - Updated the debugger addon, featuring a new profiling tab that shows which blocks your project spends the most time executing - Costumes, sounds, and sprites deleted via extensions are now fully deleted, and do not leak memory - New extension: Messaging Plus - Fixed key press lag in projects with a lot of vector costumes - Fixed over 100 bugs across extensions, compiler, and other places - Security fixes

- Fixed compatibility issues opening projects from the latest version of Scratch - New extension: Video Sprites, displaying video on sprites, compatible with the Scratch Lab experiment - New extension: DECTalk Text to Speech, a TTS engine that works offline - New extension: Tune Shark, a more advanced audio engine - New extension: Webhook, an alternative way to manage webhooks and send requests - Added polygon mode to Box 2D Physics extension, allowing using physics with complex shapes - Added block to HTTP extension to view response as data: URL - Fixed animated text extension outline color not working sometimes - Fixed HTML encoding extension swapping single and double quotes - Fixed canvas effects extension canvas size when display scale is not 100% - Fixed variable monitor errors when using custom extensions - Fixed very slow compilation in projects with a large number of custom blocks - Fixed migrating user data from versions before v1.9.0 - Added option to store crash dumps on your computer (disabled by default) to help debug crashes - Fixed a couple low-severity security issues

- Added "online?" block, like the new Scratch block with the same name - Fixed text to speech extension - Fixed packager being unable to package projects with non-Scratch extensions without an internet connection - Fixed text to speech extension and others in packager or when "Allow extensions to access any website" is enabled

- Fixed various bugs in new compiler - Optimized list monitors - Optimized middle click popup on large projects - Fixed local storage extension - Fixed camera extension not updating hidden sprites - Fixed iframe extension showing error 153 in YouTube embeds

- New compiler runs some projects twice as fast - Added face sensing extension. It uses a machine learning model that runs on your computer, so it works offline. Your webcam feed is never uploaded to any server - Local storage extension no longer requires manually configuring namespace - Newgrounds extension significantly improved - Fixed "Unexpected status 503" errors when packaging certain projects - Fixed poor performance on macOS 26

- Reduced size of packaged projects by 400KB - Fixed some large projects not working when packaged - Fixed Clipping and Blending extension - Improved performance of Animated Text extension when many clones have been created and deleted - Improved performance of Camera V2 extension when many clones have been created and deleted - Improved performance of Simple 3D extension while mouse is pressed

- Significantly optimize saving large projects - Fixed a series of security bugs related to vector costumes - Fixed various extension bugs

- New extension: Camera V2 - Fixed text bubble font - Fixed compiler bugs caused by incorrect variable type assumptions after running block in compatibility layer - Fixed interpreter bugs caused by recursive custom blocks using "stop this script" blocks - Fixed various other bugs

- Fixed disable cloud variables option in the "Edit" menu - Fixed pause button in packaged projects not adjusting timers used by blocks like "glide to" when unpausing - Fixed pause button in packaged projects not pausing videos from the video extension - Fixed files extension failing to download files in packaged projects - Fixed pointerlock extension returning incorrect values for y position - Fixed more motion extension "direction to" block returning values in incorrect range - Fixed more timers extension being affected by system time changes

- Added Steamworks extension - Extension documentation opens inside the app and does not require an internet connection - Optimized pen rendering - Improved reliability of file saving - Removed restricted trademarks - Various bug fixes and security hardening

- New extensions: Pen Plus V7, Simple 3D, Mobile Keyboard, Numerical Encoding V2, Ask Before Closing Tab, Font Manager - Added cloud variables synchronization between all open desktop app windows. This can be disabled under the "Edit" menu - Optimized project loading by about 10% - Improved high contrast extension colors - Fixed protocol handler errors - Various other bug fixes

- Fixed addon errors

- New addon: Multiple rows in backpack - New extensions: List Tools, XML, Key Simulation - The dango has become a cat - Enabled Debugger addon performance tab - Restored Scratch font with a new font that looks similar but without legal ambiguity - Fixed various fullscreen-related bugs - Various other bug fixes

- New addons: Rearrangeable custom block inputs, Skewing in costume editor, Square block text inputs, Compact editor, Customizable menu bar, Copy reporter values, Move sprite to front layer, Arrow key incrementation in editor - New extensions: WebSocket, Pen+ V6, Asset Manager, HTML encoding - Insert blocks by name addon was rewritten and works so much better - Added high contrast mode - Added dark blocks mode - Added option to change accent color from red to blue or purple - Added progress bar when loading projects from your computer - Added more stage size controls when using large custom stage sizes - Added support for generating Electron apps for ARM Linux computers - Added many new APIs for extensions - Fixed scripts imported from the backpack dropping in the wrong spot - Fixed gamepad support and costume editor snapping addons when using custom stage sizes - Fixed scroll bars when using custom stage sizes - Fixed wake lock extension - Fixed too many bugs to list here