You definetly notice the add-on is far from finished. Many things are just extremely buggy.

occasionally fails to automatically load things sometimes (so far i've only had this issue on wayback machine archived pages though)
absolutely amazing extension otherwise! props to the team for their hard work on it, also as a plus i like how it makes .swf downloading very easy

能玩4399小游戏，不过有的页游玩不了

It's ok, but in my case, it uses 100% GPU :|

Seems to work for many of the educational examples of Flash I need my students to access.