manifest.json

{
    "required_api_version": "^2.0.0",
    "name": "Session Manager",
    "description": "An extension that offers you session options",
    "developer_name": "lighttigerXIV",
    "icon": "images/icon.png",
    "options": {
        "query_debounce": 0.05
    },
    "preferences": [
        {
            "id": "kw",
            "type": "keyword",
            "name": "Session Manager",
            "default_value": "sm"
        },
        {
            "id": "icon",
            "type": "select",
            "name": "Icon style",
            "default_value": "color",
            "options": [
                {"text": "Colorful icon", "value": "color"},
                {"text": "Black icon", "value": "black"},
                {"text": "White icon", "value": "white"}
            ]
        },
        {
            "id": "desktop-environment",
            "type": "select",
            "name": "Desktop Environment",
            "default_value": "gnome",
            "options": [
                {"text": "Gnome", "value": "gnome"},
                {"text": "KDE", "value": "kde"},
                {"text": "Other", "value": "other"}
            ]
        },
        {
            "id": "other_logout",
            "type": "text",
            "name": "Other Logout",
            "description": "It will run this command on logout if other in Desktop Environment is selected",
            "default_value": ""
        }
    ]
}