Adobe did open the swf spec in later versions. Swf was compressed bytecode. Still a lot more efficient than the way we send js. https://www.adobe.com/content/d

Adobe did open the swf spec in later versions. Swf was compressed bytecode. Still a lot more efficient than the way we send js. https://www.adobe.com/content/dam/acom/en/devnet/pdf/swf-file-format-spec.pdf https://www.adobe.com/content/dam/acom/en/devnet/pdf/swf-fil... There were a number of tools that compiled to swf. It sucks that Adobe never opened the Flash Player. That was it’s death nail. They had little to gain from it. It was free. The money maker was Flash Studio and other Macromedia tools. If Adobe had opened Flash and had a sane security Sandbox it would have survived iOS. Adobe was like the old Microsoft though. They just didn’t get the power of Open Source.