First off

Let’s cut to the chase.

• Ensure that 1Password for Linux is installed along with 1Password in your browser, and that browser integration is enabled from Settings → Browser within 1Password for Linux.

Once you have done that. We can check out the file named “custom_allowed_browers” in the resource folder of 1Password.

cat /opt/1Password/resources/custom_allowed_browsers

This should return something similar to this:

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# This file, when placed into /etc/1password/custom_allowed_browsers will allow for
# custom browsers to be defined that can work with 1Password for Linux's browser extension
# integration.
#
# 1Password for Linux custom browser allowlist
#
# To add a browser here, add the filename of the browser. Multiple can be seperated by a `\n`.
# Any lines starting with `#` will be ignored.
#
# Example:
#
# vivaldi-bin
# opera

As we can see. 1Password (while not officially) has somewhat experimental support to enable the extension on other browsers. Examples here listed being Vivaldi and Opera.

This file is a whitelist for 1Password to allow a connection between applications. I would assume 1Password does this for security purposes? Anyway, I will have a complete install script below.

How to enable it

1. Close 1Password completely.
2. Open a terminal, and run sudo mkdir /etc/1password.
3. cd into the folder cd /etc/1password.
4. Run sudo vi custom_allowed_browsers or the editor of your choice (I just like vim).
5. Paste in the binary name of your web browser executable - such as opera or vivaldi-bin.
6. Save the file.
7. In the terminal, run sudo chown root:root /etc/1password/custom_allowed_browsers && sudo chmod 755 /etc/1password/custom_allowed_browsers
8. Run 1Password - It will now read the new config file and make the appropriate connections.
9. Launch your browser! 😎

A script for your convenience!

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# Here is an easy script to do it for you =)
sudo mkdir /etc/1password
sudo touch /etc/1password/custom_allowed_browsers
# Just replace Vivaldi with whatever browser you want to use.
sudo echo "vivaldi-bin" > /etc/1password/custom_allowed_browsers
sudo chown root:root /etc/1password/custom_allowed_browsers
sudo chmod 755 /etc/1password/custom_allowed_browsers

That’s it!