manifest.json

{
    "name": "Twine Enhancer",
    "short_name": "Twine++",
    "manifest_version": 2,
    "version": "1.8.4",
    "description": "__MSG_extensionDescription__",
    "homepage_url": "https://github.com/hogart/twine-enhancer",
    "default_locale": "en",
    "icons": {
        "16": "./icons/16.png",
        "48": "./icons/48.png",
        "128": "./icons/128.png"
    },

    "browser_specific_settings": {
        "gecko": {
            "id": "7a6c3c31de8b5b7389304c652dfd8c930f4bb98a@twine-enhancer",
            "strict_min_version": "57.0"
        }
    },

    "permissions": [
        "storage"
    ],

    "background": {
        "scripts": [
            "background/background.bundle.js"
        ],
        "persistent": false
    },

    "content_scripts": [
        {
            "matches": [
                "http://twinery.org/2/*",
                "https://twinery.org/2/*"
            ],
            "js": [
                "./content/content.bundle.js"
            ],
            "css": [
                "./content/common.css",
                "./content/webColors.css",
                "./content/biggerEditors.css",
                "./content/neaterPassages.css",
                "./content/toolbarButtons.css"
            ]
        }
    ],

    "options_ui": {
        "page": "options/options.html",
        "chrome_style": true
    }
}