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Facebook Social Plugin don't working in the websites

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I have the Firefox 18 installed on Linux Ubuntu 12.10 and the Plugin of comments are not working. I tried 2 sites, and I think there is a problem in the "use strict" that I have enabled in the about:config page, but I dont fint it again.

I have the Firefox 18 installed on Linux Ubuntu 12.10 and the Plugin of comments are not working. I tried 2 sites, and I think there is a problem in the "use strict" that I have enabled in the about:config page, but I dont fint it again.

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The javascript.options.strict is disabled!