Emacs as a web browser's external editor
- Firefox family (Iceweasel, Conkeror, etc)
- Webkit family (Safari, Chrome)
- Edit with Emacs "is an extension for Google's Chrome(ium) browser family
that allows you to edit text areas on your browser in a more full featured editor. It does this in conjunction with an Edit Server which services requests by the browser". It does not use Emacsclient because Chrome's security policy does not allow extensions to spawn new processes.
- Internet Explorer