Lost your Firefox passwords? AVG Anti-Virus might be the one to blame

Bane Biddix
2 min readJun 15, 2019

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Browsers nowadays have a unique tool where they keep all the information. Among these are the access data to websites and their passwords.

Since this data is essential, it is difficult to be without access to them; This is what is happening now to Firefox users that use AVG antivirus. They are losing access to their passwords.

Since the version 67.0.2 of Firefox was released there began to be reported problems. All report about the loss of all access data to websites, with usernames and passwords, are being targeted.

If you use AVG antivirus, you may have the problem

The cause of this failure has already been identified and is currently only in this antivirus. These causes were also well detailed and are known to be of an AVG component. Specifically, it is in the AVG Password Protection.

Once again, it seems that the root of this behavior is in a certificate, but that the fault can not be attributed to Mozilla or Firefox; This is a new certificate that has been renewed and which AVG Password Protection does not recognize. As such, and because it blocks access, it corrupts the Firefox file.

How to solve this Firefox problem

Of course, this file is not really in trouble and can be recovered. To do this, go to about:support and click on the Show on Finder. A File Explorer window will open and then close the browser.

In File Explorer, find the file logins.json.corrupt and rename it to logins.json. After that, you can relaunch Firefox. Keep in mind, though, that this is a workaround because restarting your computer causes the problem to return.

AVG has already acknowledged the problem and has ensured that it is primarily trying to resolve it with the utmost urgency. You will be treated with an upgrade of these components, and the new installations should not also have this problem. Once again the scripts betray Firefox, this time with the blame being a third party.

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Bane Biddix

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