Diễn đàn hỗ trợ Firefox

Hi, I have Firefox ESR 52.4.1 on a computer, and I recently installed Firefox 75.0 on a new computer.

Note that the Firefox on the first computer *cannot* be updated, owing to administrative issues (it's a company computer).

I have accessed my Firefox sync account on both computers. On both, sync is set to sync passwords/logins. I see that the sync is complete in both.

Now I see that *a few* passwords/logins are missing in the *new* Firefox. Some are there, some are not. I can see this by comparing the search results for some logins on the old Firefox (under Options/Security/Saved logins) and the new Firefox (under Logins and Passwords).

From what I see, the same passwords are in fact also missing from my android Firefox (68.7.0).

I suppose the cause may be connected to the difference in versions between the two Firefox. But why are some logins still synced then?

My questions are:

- Since I cannot update the old Firefox, how can I import the missing passwords to the new Firefox?

- Is it maybe possible to import them by copying the key3.db and logins.json files? Must I follow any specific steps to copy them?

Thank you!