Hi, everybody! Full disclaimer: I'm one of the developers behind Expressive Suite. Thank you all for your feedback; it has been beneficial. The first thing I want to address is the browser support. Sadly, Firefox and Safari do not support many of the features that most Chromium-based browsers do. There are a thousand different things that make an application feel like an application: access to the file system, access to local fonts, unrestricted access to the clipboard, etc. Without these features, it is hard to create something great. When Firefox and Safari add support for all of these, we'll gladly support them too. About the features (or the lack of them): what you see is the first pre-release of the software. We'll release a new version every week until the software matures. Unfortunately, Github does not allow us to set milestones at the organization level, so you'll need to watch the other repositories too. https://github.com/ExpressiveSuite/CanvasEngine/milestones

Also, take a look at the opened issues, and you will see what kind of formats we are planning to support. https://github.com/ExpressiveSuite/ExpressiveAnimator/issues

One more thing: we will support video exports somewhere in September. Why September? Because that's when WebCodecs will be available in Chromium-based browsers. I hope this helps.