KeepassXC browser integration issue [solved]

bonk · 2025-07-01T09:47:23.491Z

PERSONAL TESTING, THIS FIX WORKS (for instructions follow below the steps) https://github.com/keepassxreboot/keepassxc-browser/issues/1631#issuecomment-1153736766 There may be a simpler solution coming in the future. For now, attempt this if you have not tried any other solutions! (It might not work if you have tried another method)

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bonkOP•7/1/25, 9:48 AM

this is a sort of continuation from #

bazzite
https://discordapp.com/channels/1072614816579063828/1087140957096517672/1389518455157424148

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bonkOP•7/1/25, 9:56 AM

Installation: Firefox and KeepassXC are installed as a FLATPAK on the SYSTEM
Possible solution steps using the github:

Granted the browser access to KeePassXC flatpak app and KDE runtime installations, and to the KeePassXC proxy socket (RUN IN TERMINAL):

flatpak override --user \
--filesystem={/var/lib,xdg-data}/flatpak/{app/org.keepassxc.KeePassXC,runtime/org.kde.Platform}:ro \
--filesystem=xdg-run/app/org.keepassxc.KeePassXC:create \
org.mozilla.firefox

flatpak override --user \
--filesystem={/var/lib,xdg-data}/flatpak/{app/org.keepassxc.KeePassXC,runtime/org.kde.Platform}:ro \
--filesystem=xdg-run/app/org.keepassxc.KeePassXC:create \
org.mozilla.firefox

flatpak override --user \
--filesystem={/var/lib,xdg-data}/flatpak/{app/org.keepassxc.KeePassXC,runtime/org.kde.Platform}:ro \
--filesystem=xdg-run/app/org.keepassxc.KeePassXC:create \
org.mozilla.firefox

flatpak override --user \
--filesystem={/var/lib,xdg-data}/flatpak/{app/org.keepassxc.KeePassXC,runtime/org.kde.Platform}:ro \
--filesystem=xdg-run/app/org.keepassxc.KeePassXC:create \
org.mozilla.firefox

Make sure to go to ~/.var/app/org.mozilla.firefox/data and create a bin folder (it may not exist)
Created a wrapper script that will launch the official keepassxc-proxy from KeePassXC flatpak, at a path accessible by the Firefox flatpak, e.g.

~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

Into the sh file paste the following:
```#!/bin/bash

APP_REF="org.keepassxc.KeePassXC/x86_64/stable"

for inst in "$HOME/.local/share/flatpak" "/var/lib/flatpak"; do
if [ -d "$inst/app/$APP_REF" ]; then
FLATPAK_INST="$inst"
break
fi
done
[ -z "$FLATPAK_INST" ] && exit 1

APP_PATH="$FLATPAK_INST/app/$APP_REF/active"

RUNTIME_REF=$(awk -F'=' '$1=="runtime" { print $2 }' < "$APP_PATH/metadata")
RUNTIME_PATH="$FLATPAK_INST/runtime/$RUNTIME_REF/active"

exec flatpak-spawn \
--env=LD_LIBRARY_PATH=/app/lib \
--app-path="$APP_PATH/files" \
--usr-path="$RUNTIME_PATH/files" \
-- keepassxc-proxy "$@"

4. Go to the folder **~/.var/app/org.mozilla.firefox/.mozilla/** and create a folder named "native-messaging-hosts". Afterwards, in that folder create "org.keepassxc.keepassxc_browser.json". Open it in an editor and paste in:

4. Go to the folder **~/.var/app/org.mozilla.firefox/.mozilla/** and create a folder named "native-messaging-hosts". Afterwards, in that folder create "org.keepassxc.keepassxc_browser.json". Open it in an editor and paste in:

4. Go to the folder **~/.var/app/org.mozilla.firefox/.mozilla/** and create a folder named "native-messaging-hosts". Afterwards, in that folder create "org.keepassxc.keepassxc_browser.json". Open it in an editor and paste in:

4. Go to the folder **~/.var/app/org.mozilla.firefox/.mozilla/** and create a folder named "native-messaging-hosts". Afterwards, in that folder create "org.keepassxc.keepassxc_browser.json". Open it in an editor and paste in:

{
"allowed_extensions": [
"keepassxc-browser@keepassxc.org"
],
"description": "KeePassXC integration with native messaging support",
"name": "org.keepassxc.keepassxc_browser",
"path": "/var/home/USERNAME/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh",
"type": "stdio"
}```

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bonkOP•7/1/25, 9:57 AM

make sure to replace USERNAME with your own

Making the script executable (REQUIRED)

chmod +x ~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

chmod +x ~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

chmod +x ~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

chmod +x ~/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh

4.1 if that doesn't work then attempt to use this (also replace USERNAME):

{
    "allowed_extensions": [
        "keepassxc-browser@keepassxc.org"
    ],
    "description": "KeePassXC integration with native messaging support",
    "name": "org.keepassxc.keepassxc_browser",
    "path": "/home/USERNAME/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh",
    "type": "stdio"
}

{
    "allowed_extensions": [
        "keepassxc-browser@keepassxc.org"
    ],
    "description": "KeePassXC integration with native messaging support",
    "name": "org.keepassxc.keepassxc_browser",
    "path": "/home/USERNAME/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh",
    "type": "stdio"
}

{
    "allowed_extensions": [
        "keepassxc-browser@keepassxc.org"
    ],
    "description": "KeePassXC integration with native messaging support",
    "name": "org.keepassxc.keepassxc_browser",
    "path": "/home/USERNAME/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh",
    "type": "stdio"
}

{
    "allowed_extensions": [
        "keepassxc-browser@keepassxc.org"
    ],
    "description": "KeePassXC integration with native messaging support",
    "name": "org.keepassxc.keepassxc_browser",
    "path": "/home/USERNAME/.var/app/org.mozilla.firefox/data/bin/keepassxc-proxy-wrapper.sh",
    "type": "stdio"
}

Original message was deleted

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bonkOP•7/1/25, 10:57 AM

ah, so it was a mistake. Because that is what I put into my json file lol.I also tested it with the fixed version and didn't work btw

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cube•7/1/25, 10:58 AM

lol i was about to say at least we solved the mystery but ig not

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bonkOP•7/1/25, 10:59 AM

I would try and reinstall bazzite but if it's going to be fixed later on I won't bother.

Bbonk I would try and reinstall bazzite but if it's going to be fixed later on I won't...

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cube•7/1/25, 11:00 AM

yeah dont reinstall yet

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cube•7/1/25, 11:08 AM

i used an ai to write a script for the whole workaround though it looks very over engineered. havent tested it either (i have a working system and dont want it to break somehow lol)

message.txt8.31KB

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bonkOP•7/1/25, 9:08 PM

@cube yoo guess what! It worked on a reinstalled version of bazzite :beagle_happy:

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bonkOP•7/1/25, 9:08 PM

oh and sorry for ping. I had to reinstall the os because I just messed the os too much

Bbonk oh and sorry for ping. I had to reinstall the os because I just messed the os to...

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cube•7/2/25, 2:58 PM

hey no worries about the ping, im glad it worked at the end

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cube•7/2/25, 2:59 PM

oops sorry i really forgot to turn off the ping myself lol

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CheckYourFax•7/2/25, 4:38 PM

Okay

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CheckYourFax•7/2/25, 4:38 PM

@bonk what is the exact method without requiring to build a proxy?

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CheckYourFax•7/2/25, 4:38 PM

I'm testing now

CCheckYourFax I'm testing now

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bonkOP•7/2/25, 6:58 PM

Well the fix or method is just following the steps above. The github is just put there as a source on where it's from. This was the method that worked for me without issues unlike the other method which required more tinkering with stuff, from which this method FAILED to work afterwards.

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bonkOP•7/2/25, 6:58 PM

I am not a linux expert so, I am just posting what I can so others can find the solution easier

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Zaales•11/10/25, 10:41 PM

@bonk , you are my savior, I can't thank you enough for this very simple set of instruction. Working like a charm.
I had spent hours reading on how it's supposed to work, why it doesn't work with flatpak browser and the multiple, some obsolete, woraounds. I had nearly given up (well, I thought I would have to set up a distrobox) then I read this. Really cool.

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Zaales•11/10/25, 10:42 PM

step 4 worked so didn't tried 4.1

ZZaales @bonk , you are my savior, I can't thank you enough for this very simple set of ...

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bonkOP•11/10/25, 11:05 PM

Glad to hear that the fix worked! It also took me a while with help from a member to figure this out with also a few os reinstalls. Sadly, moved away from bazzite because I don't really enjoy flatpaks because of these issues

. General arch gaming is good enough for me that I don't need the performance uplift that bazzite provides (from what i recall, it is better than what I have gotten with other os's)

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Zaales•11/10/25, 11:06 PM

yeah, the "everything is sandboxed" sounds good on paper but it's actually getting in my way for so many things I don't know if I'll stay for sure

KeepassXC browser integration issue [solved]

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