I wonder there's anything special in the installation itself. It seems the default Ubuntu installation is based on Snap and the profile directory becomes something like `/home/saschanaz/snap/firefox/common/.mozilla/firefox/`. In this setup I couldn't reproduce this either with or without the pref. How did you install Firefox on your machine?
Bug 1827390 Comment 12 Edit History
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I wonder there's anything special in the installation itself. It seems the default Ubuntu installation is based on Snap and the profile directory becomes something like `/home/saschanaz/snap/firefox/common/.mozilla/firefox/`. In this setup I couldn't reproduce this either with or without the pref. How did you install Firefox on your machine? Edit: Couldn't reproduce either with Nightly installed with PPA.