When I opened my browser today, and tried to login to one of my sites, I discovered that all but three (3) of my 100s of stored logins and passwords had disappeared. I checked the Firefox browsers on my phone and iPad and they're all there, just not on my iMac. Yesterday, Firefox bumped me out of my account and I had to log back in. I didn't notice this problem then.

1 - I need to know how to download all my passwords before they disappear from my mobile accounts too. 2 - How do I get them back on my desktop browser?