Getting Vivaldi snapshot and KeePassXC working in Linux

vivaldi-snapshot-keepassxc.md

KeePassXC and Vivaldi on Linux

Vivaldi Snapshot never worked out of the box for me on both deb and arch based distros. Following the troubleshooting guide (ref, discussion) I wrote this idiot-proof guide for my future self and 4 other linux noobs who might run into this issue.

1. We need to have the KeePassXC-Browser chrome extension installed and Browser Integration allowed in KeePassXC settings.
2. Check if ~/.config/vivaldi-snapshot/NativeMessagingHosts/org.keepassxc.keepassxc_browser.json exists. If it does not, make the file and paste:

{
    "allowed_origins": [
        "chrome-extension://iopaggbpplllidnfmcghoonnokmjoicf/",
        "chrome-extension://oboonakemofpalcgghocfoadofidjkkk/"
    ],
    "description": "KeePassXC integration with native messaging support",
    "name": "org.keepassxc.keepassxc_browser",
    "path": "/usr/bin/keepassxc-proxy",
    "type": "stdio"
}

2. Now we need to check if the proxy is running. ps -fC keepassxc-proxy or ps ax | grep keepassxc-proxy if it is not, we can start it /usr/bin/keepassxc-proxy
3. Depending on the system, we want the proxy to auto-start. For i3 we can add exec /usr/bin/keepassxc-proxy into config ~/.i3/config. There are plenty other ways (ref), most quick and dirty would be adding a cron:

crontab -e
@reboot  /usr/bin/keepassxc-proxy