HI there, I understand that when you restore Firefox that some of the windows do not appear automatically, this is due to the pages no longer having an updated cached page. I do also understand that you mentioned they were black - please also make sure that the drivers are up to date, unless you have a black theme installed. [[Upgrade your graphics drivers to use hardware acceleration and WebGL]] Can you share what your history settings are for Firefox? I think I might be hearing you would like to be able to restore sessions faster?