Why do we have version 5 already?
I wonder if Google is now committed to never break the Eextensions API now. To their credit, Android has done a great job with API compatibility over versions, not breaking old apps. Maybe Chrome can too, and dropping version numbers has raised the bar for software quality, just like forcing auto-upgrades has.
The whole thing is a bit silly.
This post composed in emacs 23. (Not really)
I guess Google is lucky/smart because Chrome extensions are juiced up user scripts with no native code (I think?), but FF needs to do something to save old extensions.