Option: Browse history cleaning setting is always changing to clear history, after switching off firefox.
Why I can't save option: "remeber browsing history". When I change this option to: "remeber browsing history", then I close firefox, then i and switch on again this option is automaticly change to "clean history afterswitching off firefox". Also DRM is switching off automaticly. Name of option can be different (I have polish language), but it will be similar,
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https://support.mozilla.org/en-US/kb/how-to-fix-preferences-wont-save
Note: Some software, like Advanced SystemCare with Surfing Protection, can protect files in the Firefox profile folder against changes. If you have such software then check the settings or uninstall this software.
I'm not sure I understand what is happening.
Is this about the "History -> (Never) Remember History" choice in "Options/Preferences -> Privacy & Security" that reverts to Firefox will: "Use custom settings for history" or something different ?