StackOverflow2013

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2013-03-06T19:47:24.427
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2013-03-06T20:50:54.287
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Body
Note: See Wladimir Palant's answer for a more general overview. In the case of my example, I was actually using the function correctly, with more-or-less reasonable expectations. The problem was caused by Firefox's XPCNativeWrapper functionality. I'm still struggling to understand the details, but in a nutshell, my <code>wnd</code> object was being wrapped in an XPCNativeWrapper, and <code>testfoo.js</code> was considered a "protected" script, which meant that I could not see any changes made to the object once control passed back from <code>testfoo.js</code>. The solution is to unwrap the object before (or after -- that works too) passing it to the subscript, as follows: <pre><code>var wnd = XPCNativeWrapper.unwrap(doc.defaultView); </code></pre> As soon as I did that, the variables/properties modified by <code>testfoo.js</code> became visible to the parent script. I do not yet understand the full infrastructure well enough to know whether this is "safe". After all, this is a security mechanism designed to protect my extension from malicious code on the browser page. I am also seeing some problems with passing objects into methods defined by the subscript (not shown in my example). For that, I will make a separate question. Long story short: Unwrapping is a (probably "the") solution for the immediate problem as posed in my question, but does not appear to be a complete solution to the difficulties I was having that engendered the question in the first place.
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1. POHow do I use the "targetObj" parameter to loadSubScript() in firefox extensions?
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1. USRick Koshi
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1. USRick Koshi
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1. POHow do I use the "targetObj" parameter to loadSubScript() in firefox extensions?
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