After having reformatted and restored my Sony Vaio laptop, I reinstalled Firefox and copied my profile to the appropriate place. All good. After about 3 weeks Firefox suddenly stopped storing my login pairs; worse, it has deleted all the ones that were in there. I had installed a privacy app called abine blur but have disabled it in Firefox so that it is no longer operating, but Firefox is still not storing any login data.

Is there anything I can do short of uninstalling Firefox and switching to Chrome as my main browser?