Local access to files via file:// seems no more possible outside the sandbox filesystem, the snap version of Firefox is referring to when one uses such URLs. Note that file:// URLs are allowed but they seem to point inside some kind of sandbox. I'm not familiar with the snap architecture, so excuse my jargon, but what I mean is, e.g., file:///usr/lib/jvm/... is of course not available in the sandbox system but only on my root file system.
Solutions circumventing access security policies wouldn't work because of that construction. In fact, the Mozilla support website recommends to install the plain FF package. Further issues filed suggest that this is not optimal for other reasons and that there is no obvious solution. (I, e.g., need that feature because my Java IDE uses file:// URLs to direct me to the local Java API docs, but there are many other applications that would expect such access to work.)
My question, hence, is, can I use file:// URLs to access my root file system as usual with the Firefox snap version without the need to switch back to the FF deb version and without the need to circumvent security policies, e.g., in about:config?
