Custom Karibiner mods

TimTom.karabiner

{
  "title": "TimTom's Mods",
  "rules": [
    {
      "description": "Cmd+D == Cmd+L in Chrome Firefox and Safari",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_gui"
              ]
            },
            "key_code": "d"
          },
          "conditions": [
            {
              "type": "frontmost_application_if",
              "bundle_identifiers": [
                "org.mozilla.firefox",
                "com.google.Chrome",
                "com.apple.Safari"
              ]
            }
          ],
          "to": [
            {
              "repeat": true,
              "key_code": "l",
              "modifiers": [
                "left_gui"
              ]
            }
          ]
        }
      ]
    },
    {
      "description": "Cmd+Tab > Ctrl+Space in Firefox",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_control"
              ]
            },
            "key_code": "tab"
          },
          "to": [
            {
              "repeat": true,
              "key_code": "spacebar",
              "modifiers": [
                "left_control"
              ]
            }
          ],
          "conditions": [
            {
              "type": "frontmost_application_if",
              "description": "",
              "bundle_identifiers": [
                "org.mozilla.firefox"
              ]
            }
          ]
        },
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_control",
                "left_shift"
              ]
            },
            "key_code": "tab"
          },
          "to": [
            {
              "repeat": true,
              "key_code": "spacebar",
              "modifiers": [
                "left_control",
                "left_shift"
              ]
            }
          ],
          "conditions": [
            {
              "type": "frontmost_application_if",
              "description": "",
              "bundle_identifiers": [
                "org.mozilla.firefox"
              ]
            }
          ]
        }
      ]
    },
    {
      "description": "cmd+q to cmd+w ",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_gui"
              ]
            },
            "key_code": "q"
          },
          "to": [
            {
              "repeat": true,
              "modifiers": [
                "left_gui"
              ],
              "key_code": "w"
            }
          ]
        }
      ]
    },
    {
      "description": "cmd+shift+q to cmd+w",
      "manipulators": [
        {
          "type": "basic",
          "from": {
            "modifiers": {
              "mandatory": [
                "left_gui",
                "left_shift"
              ]
            },
            "key_code": "q"
          },
          "to": [
            {
              "repeat": false,
              "key_code": "q",
              "modifiers": [
                "left_gui"
              ]
            }
          ]
        }
      ]
    }
  ]
}

To edit: https://genesy.github.io/karabiner-complex-rules-generator/

The first maps Cmd+D to Cmd+L in Firefox, Safari, and Chrome. The reason for that is alt+d on windows always takes you to the address bar and I've been using that combo for 20+ years.

The second one maps cmd+tab to cmd+space in Firefox. Long story involving a specific keyboard with custom mappings, but cmd+space triggers the "Fast Tab Switcher" plugin.

Added cmd+shift+tab to second mapping

Added mapping for cmd+q to cmd+w and cmd+shift+q to cmd+q. I've accidentally hit cmd+q too many times to count.