Backspace for Back Button

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "__MSG_extensionName__",
    "version": "1.0",
    "description": "__MSG_extensionDescription__",
    "content_scripts": [
        {
            "matches": [
                "<all_urls>"
            ],
            "js": [
                "content\/inject.js"
            ],
            "css": [
                "content\/inject.css"
            ],
            "run_at": "document_start"
        }
    ],
    "icons": {
        "128": "icons\/icon128.png"
    },
    "content_security_policy": {
        "extension_pages": "default-src 'self';"
    },
    "homepage_url": "https:\/\/backspace-for-back-button.pdfwork.com",
    "background": {
        "service_worker": "background.js"
    },
    "default_locale": "en"
}