Ubuntu installs Firefox as the default browser. You'll need to manually install Chromium if you want to use the browser on your Ubuntu system.
Chromium web browser is available for Ubuntu and Debian in their default apt repository. You can install Chromium using apt at the terminal. apt will automatically download and install Chromium binaries along with required dependencies.
$ sudo apt update [sudo] password for user: Hit:1 http://security.ubuntu.com/ubuntu focal-security InRelease Hit:2 http://jp.archive.ubuntu.com/ubuntu focal InRelease Get:3 http://jp.archive.ubuntu.com/ubuntu focal-updates InRelease [111 kB] Get:4 http://jp.archive.ubuntu.com/ubuntu focal-backports InRelease [98.3 kB] Fetched 210 kB in 2s (121 kB/s) Reading package lists... Done Building dependency tree Reading state information... Done All packages are up to date.
$ sudo apt install --assume-yes chromium-browser Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: chromium-browser 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 48.5 kB of archives. After this operation, 164 kB of additional disk space will be used.## ### snipped
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