Q: When I open PDF files from Mozilla Firefox for viewing in PDF Studio application, it shows multiple permission errors and I am not able to access Preferences. How can I solve this issue?
Unable to write your settings in your user home folder.
Make sure you have permission to save a file under your user directory (home/john)
If you need assistance, contact support at studiosupport@qoppa.com
A: Ubuntu 22.04 comes with Firefox snap version pre-installed and this version is restricted in terms of permissions. When launching PDF Studio from this Firefox version, it does not allow PDF Studio to access your user home folder in order to read and write settings (including Preferences, Stamps, Signatures…)
In order to solve this issue, you will need to uninstall Firefox snap version and install classic Deb version. See the steps below:
Step 1: Remove the Firefox Snap in Ubuntu 22.04
Open Terminal and enter this command to remove Firefox snap version
sudo snap remove firefox
and remove the empty DEB package as well
sudo apt remove firefox
Step 2: Add Mozilla’s PPA
Open Terminal and enter this command
sudo add-apt-repository ppa:mozillateam/ppa
Step 3: Set PPA priority
Open Terminal and enter this command
sudo gedit /etc/apt/preferences.d/mozillateamppa
When gedit is launched, copy and paste these lines and save the document
Package: firefox*
Pin: release o=LP-PPA-mozillateam
Pin-Priority: 501
Run this command to apply changes
sudo apt update
Step 4: Install Firefox as a DEB Package on Ubuntu 22.04
sudo apt install firefox
Launch Firefox again and you shouldn’t see “Snap” on About screen
You can now use PDF Studio to open PDF files from Firefox.
