My experience with swift is that it's very slow, bloated, buggy, and prone to crashing.
Safari seems able to use any netscape-style plugins, they don't -have- to be the official real, qt, etc. If you can find an alternative, netscape-style plugin for any such format, you should be able to just dumpt the np~.dll file into safari's plugins folder.
I see that there are extensions
Forum:
General