linux: Update the 1Password integration guide

content/docs/guides/1password.mdx

@@ -25,6 +25,16 @@ That being said, there are workaround methods to add Zen Browser to this _Truste
 
 You can create a _Custom Allowed Browsers_ file that 1Password will use to allow Zen Browser -- or other non-officially supported browser-- to integrate with 1Password's desktop app.
 
+<Callout type="info">
+Your 1Password application and the Zen browser need to be installed _directly_ to your machine, not through a container-like program such as `flatpak` or `snap`. Additionally, they both need to be owned by the `root` user.
+
+If they are not installed directly to the system, Zen _will not_ be able to talk to 1Password.
+
+If they are not owned by `root`, Zen _will_ be able to talk to the native 1Password app but will not be able to be verified by the "Native Core" of 1Password.
+
+See: [Connect additional browsers to the 1Password app](https://support.1password.com/additional-browsers/?linux)
+</Callout>
+
 #### 1. Create 1Password's config directory
 
 ```bash
@@ -43,6 +53,16 @@ sudo touch /etc/1password/custom_allowed_browsers
 echo "zen-bin" | sudo tee -a /etc/1password/custom_allowed_browsers
 ```
 
+#### 4. Ensure the right permissions are set for the Custom Allowed Browsers file
+
+```bash
+sudo chown root:root /etc/1password/custom_allowed_browsers && sudo chmod 755 /etc/1password/custom_allowed_browsers
+```
+
+#### 5. Restart both programs.
+
+In order to pick up the changes you just made, both 1Password and Zen need to be restarted.
+
 ---
 
 Special thanks to [u/xmansyx](https://www.reddit.com/user/xmansyx/) and [u/feelspeaceman](https://www.reddit.com/user/feelspeaceman/)