I'd like to have all firefox installations I use synced. The "starting point" should be a specific firefox installation, from now called "Firefox A". Means: First, every firefox installation is like this installation "A", then everything I change at one installation is applied to all the others. Now and then I'm on another PC which is mine then for some weeks, there I'd like to log in - have all my Bookmarks, Add-Ons etc and everything I change from there should be applied to all the other installations. After some weeks I'd like to log-out again and everything should be like before. I never have to of this devices together! This should be able to do with firefox sync, shouldn't it? But I don't get it. I red all supertartikels on the official firefox website. So what did I try? From Firefox Installation "A" I made a sync account, from another I connected to sync. What happened. Suddenly I have a hodgepodge from bookmarks that were there before and from the bookmarks from the other installation. My Add-Ons from the Installation "A" were there. My Tabs weren't synced. From then nothing synced anymore. no matter if I changed my bookmarks or Tabs on the one or the other installation - nothing synced. Can you help me?