[mrbig4545]

addons do not use npapi, so vimperator, ublock, tab mix plus, etc will still work

[uxcn]

For now, but XUL and XPCOM are also on the chopping block. Overall, it looks like Mozilla is planning to get rid of native access entirely.

[dblohm7]

There's nothing stopping you from bundling native code with your addon and having the addon launch the native process and communicate via a pipe.