If you want to explore specific options for your operating system, tell me:

An SWF file is the compiled output of a Flash project. It contains code (ActionScript), vector graphics, audio, and video. Because modern browsers (Chrome, Firefox, Edge, Safari) have removed the internal plugins required to read this code, you now need standalone software to interpret these files.

However, these general-purpose players lack the exclusive features of dedicated SWF players, such as frame-by-frame inspection, ActionScript debugging, and resource extraction.

Beautiful macOS interface; built-in web browser to browse SWF links; advanced playback controls. Cons: Premium features require a paid license; Mac only.

Flash required heavy CPU processing, which drained mobile device batteries and caused browser instability.