TOR Browser always reverts to 'use custom settings for history'
Whenever I change the settings in Privacy preferences to 'Never remember history', the browser immediately reverts that to 'Use custom settings for history'. Even if I come back right after closing the menu, still in the same browser session, the settings are already reset, so of course my changes are not preserved across different sessions either (upon restart the browser one is back to 'Use custom settings for history'). All files in tor-browser_en-US/ are owned by me, so preferences changes should stick. Why is it not the behavior?
I am using the latest bundle tor-browser-gnu-linux-x86_64-2.2.39-5-dev-en-US.tar.gz but this issue has been around ever since I tried TOR (all versions since and including tor-browser-gnu-linux-x86_64-2.2.38-2-dev-en-US.tar.gz).