Hi, Since recently, I am using and syncing FF (full sync, including seetings) on several computers and several platforms (Win, OS X, Ubuntu, and iOS). And I have a problem on OS X only (with FF 43) : A few days after the initial setup, FF stopped remembering the passwords : all the saved ones were forgotten, and FF was no longer proposing me to remember new ones. In the settings/privacy, the box "remember passwords" was still checked, but with an empty list of saved passwords and no exception. All my other machines were OK : the problem was on OS X only. I couldn't find a solution, so I decided to completely uninstall Firefox, the preference files, my profile, etc... And then I reinstalled it and enabled sync. It solved the problem : FF was now remembering and syncing the passwords... But a few day later exactly the same problem came back... Any help appreciated...