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由 daidardi 发表于 Dec. 8, 2013 · 永久链接

I was having some trouble at firefox starting and restoring session didn't run correctly. Then I got the Duplicate Tab Blocker Addon didn't allow Session Manger to restore previous session.
I'd like to warn you about it.
https://addons.mozilla.org/it/firefox/addon/duplicate-tab-blocker/