Compile a userscript to a Safari and an Opera extension?

Question

I built a Greasemonkey userscript for Firefox and Chrome, and I now want to convert it to a Safari extension and an Opera extension.

Are there any compilers out there like Arantius' Greasemonkey-to-extension compiler but for Opera or Safari?

Answer 1

There isn't a good compiler for converting userscripts into Safari or Opera extensions. Some userscripts work on Opera though, and there are some older Safari extensions that run some userscripts, but I don't hear good things about them.

Answer 2

Take a look on http://kangoextensions.com/ it supports all the browsers you want. You can start with this post http://kangoextensions.com/blog/modifying-content-of-web-pages-using-jquery/ showing how you can create a content script and use jQuery in it.