I installed Firefox portable version on my computer A and B. I set up the primary password on the computer B. I found that I forgot the primary password yesterday. So, I deleted Firefox from the computer B. Afterwards, I copied and pasted the Firefox portable from the computer A to B. Everything looked fine. The primary password checkbox was unchecked, so I didn't need to worry about it.

However, when I launch Firefox on the computer B today, it asked me the primary password again. As far as I know, all data is saved in the portable folder and I don't understand why it happened. How do I solve this issue?