https://bugs.kde.org/show_bug.cgi?id=469832
Bug ID: 469832
Summary: AppArmor prevents fcitx5 working on Firefox
Classification: KDE Neon
Product: neon
Version: unspecified
Platform: Neon
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: Packages User Edition
Assignee: neon-b...@kde.org
Reporter: phanect...@gmail.com
CC: j...@jriddell.org, neon-b...@kde.org, sit...@kde.org
Target Milestone: ---
SUMMARY
I want to input Japanese using fcitx5, but I cannot input Japanese only on
Firefox.
On other apps, fcitx5 works fine and I can input Japanese without any problems.
It works appropriately on Kate (Qt-based), Inkscape (GTK-based), and Google
Chrome (GTK-based?).
In addition, fcitx5 works on Firefox installed from snap. This issue only
happens on Firefox from the PPA.
It is probably caused by AppArmor and it can be solved by disabling Firefox
profile of AppArmor.
See ADDITIONAL INFORMATION section for details.
STEPS TO REPRODUCE
1. `sudo apt install firefox fcitx5 fcitx5-mozc kde-config-fcitx5` and reboot
2. Set mozc to the default IME of the fcitx5
3. Open Firefox, and press katakana/hiragana key (only exist in Japanese
keyboard) to enable fcitx5
4. focus on the address bar and press "a" key for four times
OBSERVED RESULT
"aaaa" is entered in the address bar
EXPECTED RESULT
"ああああ" is entered in the address bar
SOFTWARE/OS VERSIONS
Linux/KDE Plasma:
KDE Plasma Version: 5.27.4 (KDE neon 5.27)
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
Firefox version: 113.0, installed from
https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu (Mozilla PPA)
fcitx version: 5.0.23, installed from http://archive.neon.kde.org/user
ADDITIONAL INFORMATION
The following commands disable an AppArmor profile for Firefox.
By running these commands and restarting Firefox, I could successfully input
Japanese using fcitx5 on Firefox from PPA.
```
$ sudo ln -s /etc/apparmor.d/usr.bin.firefox /etc/apparmor.d/disable/
$ sudo apparmor_parser -R /etc/apparmor.d/usr.bin.firefox
```
I hear Kubuntu disables this AppArmor profile by default to solve this issue.
I know it is not the best solution because it degrades the security level, but
is it possible to disable the profile on KDE neon by default as well?
---
I asked fcitx developer and Ubuntu Japanese team member for help to investigate
this problem. Here are the answers from them:
fcitx5 does not work only on Firefox
https://github.com/fcitx/fcitx5/discussions/789
Cannot input Japanese using fcitx5 on Firefox installed from the deb from the
PPA (Japanese)
https://lists.ubuntu.com/archives/ubuntu-jp/2023-May/006616.html
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