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от Ibizanhound Март 11, 2016 ·

Worked fine for me until FF 45. If I am not mistaken the author is not supporting its development anymore. Anyone knows any alternatives?

Это отзыв для предыдущей версии этого дополнения (1.7.5.1-signed). 

от Paolo "Kaosmos" (Разработчик) на Июнь 24, 2016 ·

This bug should be fixed in 1.7.6 version, released now.
A workaround is to set the preference "extensions.profileswitcher.use_onbeforeunload" to false, but I suggest to try before the new version.

I'm still supporting the development, because this extension is for Thunderbird too, of course when XPCOM/XUL will be dropped support for Firefox will end.