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Have been through the previous advice given regarding this topic & most of it is of no help. There is no 'old firefox data' folder on the desktop or elsewhere, so pre… (xem thêm)
Have been through the previous advice given regarding this topic & most of it is of no help. There is no 'old firefox data' folder on the desktop or elsewhere, so presume this is not due to an update. I also haven't recently installed any AV software. The logins.json file and logins-backup.json file have reduced down to 2KB, when they should be much larger (approx 100KB). Both files dated 31/07/2021. Fortunately I have a number of PC's - one of which I used Firefox on yesterday, so I have copies of both .json files dated 30/07/2021. They are both sized 125KB. I have noted that the PC's all have 2 User profiles, the first being the .default profile & the second the .default-release profile. On the PC I am having the problem with, the active profile appears to be the .default profile whereas on the other PC's it is the .default-release profile. I am going to replace the 31/07/2021 files with the 30/07/2021 files & see if that solves things, but it won't answer why the situation happened in the first place. Just to clarify, the active profile on all the PC's is the only one that contains the logins.json and logins-backup.json files. In fact, on the other PC's the non-active profile only contains one file: times.json, whereas on the problem PC it contains a lot more, sub-directories as well as files.