Comment 3 for bug 1977782

Thank you for taking the time to report this bug and helping to make Ubuntu better. Unfortunately, we cannot work on this bug because your description didn't include enough information.

I just tried
1) guiverc@d960-ubu2:~$ firefox ~/d960_stats.txt
2) guiverc@d960-ubu2:~$ firefox /mnt/de2900/lan/guiverc/lshw_d755.txt
and firefox opened both times & showed me that file.

Firefox as a snap package runs confined, thus cannot read the whole file-system, so your issue maybe trying to read files on your file-system outside of where it has access (ie. user error), however you provided no specifics. Please be specific with examples of file locations, or commands where it failed to operate.

I've marked this bug as 'incomplete' as no specific examples were provided, and the firefox snap can open open files in $HOME, /mnt, /media.. but is limited to certain directories only for security purposes (confinement)

Bug reporting is mostly about finding & fixing problems thus preventing future users from hitting the same bug.

I suspect a Support site would be more appropriate, eg. https://answers.launchpad.net/ubuntu. You can also find help with your problem in the support forum of your local Ubuntu community http://loco.ubuntu.com/ or asking at https://askubuntu.com or https://ubuntuforums.org, or for more support options please look at https://discourse.ubuntu.com/t/community-support/709