How to configure Alt + Tab to switch between any instance of any application opened in any workspace on Ubuntu Focal Fossa 20.04?

Question

I'm back to Ubuntu since it is back to Gnome. When I used other Gnome distros, I could switch between two Terminal windows using Alt + Tab no matter the workspace they were.

Ubuntu 18.04 introduced a "window switcher" that showed every application in every workspace but you had to use another shortcut to switch between instances (Alt + '). I fixed it using a Gnome extension I can't find anymore. I don't even remember the name.

Is there a way in Focal Fossa (20.04) to achieve both functionalities (switch between any instance of any application in any workspace) with only two keys (Alt + Tab)?

It is an accessibility issue for me.

Answer 1

as suggested in this answer — shortcut keys - Force alt + tab to switch only on current workspace in GNOME shell - Ask Ubuntu — the settings that might work for you are:

gsettings set org.gnome.shell.window-switcher current-workspace-only false
gsettings set org.gnome.shell.app-switcher current-workspace-only false

The first line is required for 22.04, the second may be a legacy setting.

Answer 2

I found the extension I used in Ubuntu 18.04: https://extensions.gnome.org/extension/15/alternatetab/

Answer 3

The AlternateTab extension mentioned in Almino's answer is no longer supported.

The solution to getting the same functionality working is described in The future of AlternateTab, and why you need not worry, which links to a Gnome.org video showing the steps:

1. Open the control panel Keyboard Shortcuts
2. Within Keyboard shortcuts, search for the built in Window Switcher entry and enable it.

However, with respect to the AlternateTab extension, as the linked article states:

In GNOME 3.30 this now works without the extension, which brings us to the extension’s future mentioned in the title. After the above explanation it shouldn’t come as a surprise that there is none — the extension will be retired for GNOME 3.32. If you are currently using it, please set up the built-in “Switch Windows” shortcut as outlined above, and enjoy having one less extension to worry about on updates…