Hi, So, if I have many tabs opened and when I login to gmail over the "mail.google.com" site, the moment when Firefox is starting to load in the my gmail account, it starts to reload not all but many tabs, which in affect slows down drastically my gmail account loading time. Up to few minutes, depending on how many tabs are reloaded and how this sites are big of course. This thing started to happen since Firefox version 25, and it was not present before as I can remember. Since not all tabs are reloading, I belive that this has something to do with java scripts on this sites or something, so probable when gmail login/sign out triggers some script it activates all this scripts in all loaded sites in Firefox tabs that have this same script. You see, when you force shot down/restart Firefox, and Firefox opens again (in this case it shows all the tabs of all the pages but it doesn't load the sites up until you don't click on the tab) it does not reload this tabs on gmail login/sign out like he did before, but when you reload the sites by clicking on the tab, and they get loaded in the memory, they will start to reload again every time you login/sign out of gmail. Kind regards