There are somewhat larger differences between Firefox 4 and Firefox 3. I haven't tried Firefox 4 yet, so it's not unlikely that the module fails there.

For further debugging, you will likely have to dive into the XUL-DOM of Firefox 4 and find out what methods the Javascript code tries to call, and what methods it should call instead.

In reply to Re: FireFox application:closeTab does not work on firefox4? by Corion
in thread FireFox application:closeTab does not work on firefox4? by seven_shen

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