Linux

Cinnamon

Workspaces

• Control-Alt-UpArrow: show workspaces
• add workspaces: https://unix.stackexchange.com/questions/57311/how-do-i-change-the-number-of-available-workspaces-in-cinnamon

Keybindings

C-M-<backspace> Kill X Server

Preferences > Keyboard > Layouts > Options > Key Sequence to kill the X Server

Firefox

Kill Updates With Fire: https://support.mozilla.org/en-US/questions/1327455

$ cat /usr/local/share/firefox/distribution/policies.json 
{
  "policies": {
    "DisableAppUpdate": true
  }
}