Avaliado em 3 de 5 estrelas

Thanks Paolo for looking into this.
I installed the latest version 1.7.5.1 but it still didn't fix the problem.
I then went to about:config and changed the property of "extensions.profileswitcher.use_onbeforeunload" to false in all the profiles I have created and I can finally switch between them again.

Esta análise é para uma versão anterior da extensão (1.7.5.1-signed).  Esse usuário tem uma análise anterior desta extensão.

Install the 1.7.6.1 when it will be approved by AMO and try to revert that preference to true, it should work as expected