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I use containers too. I didn't loose any data after I enabled dev mode and added the extension back. Perhaps you removed the existing extension first and lost d

• neogodless 7y ago
  It's odd - on my laptops, my multi-container settings were preserved, but I opened firefox on my desktop last night and they had vanished. I did not remove any add-ons myself.
  • nikbackm 7y ago
    Same here. Only difference is that I restarted the desktop Firefox and also enabled Shield studies to get the temporary fix. On the laptop I just upgraded to 66.0.4 and only then restarted it.
• SamWhited 7y ago
  I did not disable or remove the extension, my containers were just all gone after the study was pushed and extensions came back.
• neogodless 7y ago
  To the best of my understanding, here's what happens. * containers.json is reset to default * if you have any non-default containers, they are lost * the underlying data is still in IndexDB (??) but isn't connected to the custom containers that were wiped out * if you're clever and can read the IndexDB (or wherever the data is, it's moved a few times) then you could probably rebuild your containers.json file