There are a couple of steps required to make this work and, fortunately, it's not too crazy. Here's how you can do this:
Open Terminal (if it's not already open), and remove chromium snap package if you already have not.
sudo apt purge chromium-browser
Create an apt source file for the Mint repository:
For Ubuntu 20.04:
echo "deb http://packages.linuxmint.com una upstream" | sudo tee /etc/apt/sources.list.d/mint-una.list
For Ubuntu 22.04 (and newer):
echo "deb http://packages.linuxmint.com victoria upstream" | sudo tee /etc/apt/sources.list.d/mint-victoria.list
for 24.04
echo "deb http://packages.linuxmint.com wilma upstream" | sudo tee /etc/apt/sources.list.d/mint-wilma.list
1. To prevent `NO_PUBKEY` you have to add the GPG key by this:
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com A1715D88E1DF1F24 40976EAF437D05B5 3B4FE6ACC0B21F32 A6616109451BBBF2
1. Then update package lists by `apt`:
sudo apt update
1. Prevent installation of other packages by pin-file:
cat <<EOF | sudo tee /etc/apt/preferences.d/pin-chromium
Package: *
Pin: release o=linuxmint
Pin-Priority: -1
Package: chromium
Pin: release o=linuxmint
Pin-Priority: 1000
EOF
1. Install `chromium`:
sudo apt install chromium
1. Open `chromium` and check the About:
![Mint's Chromium in 20.04][1]
<sup>**Note:** You may want to change the landing page, which is all about Mint Una </sup>
This will give you what you're looking for