Use KeepassXC with Web Browsers

Because web browsers in KDE Linux are sandboxed Flatpaks, there are some difficult-to-bypass limitations in how they can interact with other apps. Unfortunately, this includes KeepassXC.

At the moment, no simple solution exists, and general users are recommended to choose a different method of managing passwords.

Advanced users comfortable with tinkering and recovering from breakage can try out the highly experimental steps described at one of the following websites:

• https://www.snamellit.com/blog/keepassxc-and-flatpak
• https://discourse.flathub.org/t/how-to-run-firefox-and-keepassxc-in-a-flatpak-and-get-the-keepassxc-browser-add-on-to-work/437

See also

• https://bugzilla.mozilla.org/show_bug.cgi?id=1955255
• https://lists.freedesktop.org/archives/flatpak/2025-April/002386.html
• https://github.com/flatpak/xdg-native-messaging-proxy

Article contributed by Nate Graham under the CC-BY-4.0 license.