manifest.json

{
    "manifest_version": 3,
    "name": "Keybindings for Linux users",
    "description": "Swap that alt for ctrl and Vim-up your keys.",
    "version": "0.1",

    "permissions": [
        "tabs"
    ],

    "background": {
        "scripts": ["background.js"]
    },

    "commands": {
        "1": {
            "suggested_key": {
                "default": "Ctrl+1"
            }
        },
        "2": {
            "suggested_key": {
                "default": "Ctrl+2"
            }
        },
        "3": {
            "suggested_key": {
                "default": "Ctrl+3"
            }
        },
        "4": {
            "suggested_key": {
                "default": "Ctrl+4"
            }
        },
        "5": {
            "suggested_key": {
                "default": "Ctrl+5"
            }
        },
        "6": {
            "suggested_key": {
                "default": "Ctrl+6"
            }
        },
        "7": {
            "suggested_key": {
                "default": "Ctrl+7"
            }
        },
        "8": {
            "suggested_key": {
                "default": "Ctrl+8"
            }
        },
        "9": {
            "suggested_key": {
                "default": "Ctrl+9"
            }
        }
    }
}