Enable Always Open checkbox in chromium

README.md

How to enable Always Open Checkbox in Chromium again

In version 77 of Chromium (Chrome, Edge, Opera and etc) the always open checkbox was hidden unless renabled by settings.

The always open checkbox is for instance helpful if you join a lot of zoom meetings.

The preference you want to enable is ExternalProtocolDialogShowAlwaysOpenCheckbox which is different for each OS.

MacOS

Run this command

defaults write com.google.Chrome ExternalProtocolDialogShowAlwaysOpenCheckbox -bool true

Windows

Create a .reg file with the following content

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome]
"ExternalProtocolDialogShowAlwaysOpenCheckbox"=dword:00000001

Or run this powershell script

New-Item 'HKLM:\SOFTWARE\Policies\Google\Chrome' -Force | New-ItemProperty -Name ExternalProtocolDialogShowAlwaysOpenCheckbox -Value 1 -Force | Out-Null

Linux

Create a /etc/opt/chrome/policies/managed/managed_policies.json file with the following content

{
  "ExternalProtocolDialogShowAlwaysOpenCheckbox": true
}

or Run this script

mkdir -p /etc/opt/chrome/policies/managed/
cat >> /etc/opt/chrome/policies/managed/managed_policies.json <<EOL
{
  "ExternalProtocolDialogShowAlwaysOpenCheckbox": true
}
EOL