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JavaScript Deobfuscator Firefox extension
Posted by: trev
Date: February 03, 2009 06:28AM

I wrote a simple extension to display JavaScript code that's compiled/executed on web pages: [addons.mozilla.org]. You simply open the deobfuscator window via Tools menu and go to some web page. The extension is getting its data directly from the JavaScript engine meaning that all JavaScript code across the entire browser is being tracked, no matter how it gets to run. Also, the code is somewhat beautified compared to the original.

Feedback is welcome. In particular, I would appreciate reviews on addons.mozilla.org - need at least one more to remove that "experimental" tag.

Btw, I don't recommend analyzing JavaScript code of truly malicious websites outside a virtual machine of course. This extension is only logging, it isn't preventing anything malicious from happening.

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