Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Sykje yn Support

Mij stipescams. Wy sille jo nea freegje in telefoannûmer te beljen, der in sms nei ta te stjoeren of persoanlike gegevens te dielen. Meld fertochte aktiviteit mei de opsje ‘Misbrûk melde’.

Mear ynfo
Dizze konversaasje is argivearre. Stel in nije fraach as jo help nedich hawwe.
Oplost Argivearre

Permission denied when opening file from another drive

Firefox Probleemoplossing
zeroknight hat 2 jierren lyn antwurde
Bic
Bic

When opening a file from another drive, I get an error: Access to the file was denied

I know this can happen on the Snap version, but I have Firefox installed from a deb!

When opening a file from another drive, I get an error: Access to the file was denied I know this can happen on the Snap version, but I have Firefox installed from a deb!
zeroknight
zeroknight
Dit antwurd yn kontekst lêze

Keazen oplossing

Ubuntu has an apparmor profile for /usr/lib/firefox/firefox. You can add paths you want to be accessible to /etc/apparmor.d/tunables/home.

Alle antwurden (5)

SuMo Bot
SuMo Bot

Show the error message. I assume the drive is already mounted. Can you access the file via the file explorer in you OS? I'm curious to know what file you're trying to access via the internet browser instead of the normal file explorer? See what happens with Firefox from Mozilla. Just download, unzip, and run firefox-bin to see if you have the same issue. https://www.mozilla.org/en-US/firefox/all/#product-desktop-esr

Bic
Bic Fraacheigener

Yes, I can access the file with the file explorer. It also works fine when I open it with Firefox ESR from that link and the stable version of Firefox from that link. The permissions on the file look correct: -rw-rw-r--. Is there a way to tell whether Firefox was installed through snap from within Firefox itself? It seems to be installed through apt, but I know that some apt packages are secretly installed as snaps, which apparently can cause issues.

apt list --installed | grep firefox

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

firefox/jammy,now 119.0+build2-0ubuntu0.22.04.1~mt1 amd64 [installed,automatic]

zeroknight
zeroknight

Keazen oplossing

Ubuntu has an apparmor profile for /usr/lib/firefox/firefox. You can add paths you want to be accessible to /etc/apparmor.d/tunables/home.

Bic
Bic Fraacheigener

Thanks!

I don't want other apps to access this drive so I added /e/* r, to /etc/apparmor.d/usr.bin.firefox. My drive is mounted at /e. To anyone else using this answer, reload the apparmor profile with sudo service apparmor reload after making changes and see if it works

zeroknight
zeroknight

Changing the apparmor profiles directly will conflict with updates, instead you should use a local override in /etc/apparmor.d/local/usr.bin.firefox.