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由 danger89 发表于 April 5, 2011 · 永久链接

Try to download the xpi with right click, save as... Then rename xpi to .zip open install.rdf file with text editor. Search for 3.6.*, replace it by 4.0. Save it again, rename zip back to xpi. Finally open the xpi with Firefox 4.0. Tataaaa :)