Browser addon development

Are there any good websites for instructing how to write browser addon for IE, firefox, chrome and Safari?

No开发者_Go百科t sure whether writing there is some frameworks which can be used to write addon for all major browsers such that one sourcecode for all major browsers.

Thanks.

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IE and Firefox have very different plug-in models. IE supports binary helper objects (your native code running in IE's processes). Here’s how you can build one: http://blogs.msdn.com/b/ie/archive/2008/04/04/designing-for-add-on-performance.aspx, here’s why you should spend as little of your users’ time as possible in your code: http://blogs.msdn.com/b/ie/archive/2011/03/23/updates-to-add-on-performance-advisor.aspx