[Greasemonkey] Cannot use GreaseMonkey :-(

[Simon Willison]

It strikes me that the usability involved with Greasemonkey are very  
similar to the ones involved with RSS feeds - it's counter-intuitive  
to have to be looking at a page full of meaningless code (meaningless  
unless you know JavaScript) in order to install it.

The RSS/Atom/etc community are still looking for a solution to this  
three years on - so far the best I've seen is Safari 2.0 and OS X  
Tiger, where you can set your default RSS reader and then clicking on  
the blue RSS logo in Safari will subscribe you in it. I think they  
did that with a custom feed:// URL scheme.

Would a custom mime type for user scripts work? The reason feed:// is  
needed in feed syndication is that the application to which the feed  
is passed needs to know it's URL - otherwise a mime type would work  
fine. Of course, the problem with custom mime types is that they  
require server administrators to configure them, which can be  
difficult to impossible for people on shared hosting plans.  
The .user.js thing works well as a fallback in that case though.