Multiselect for YouTube™

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "action": {
        "default_icon": {
            "24": "icons\/24.png",
            "48": "icons\/48.png"
        },
        "default_popup": "popup.html"
    },
    "author": "Pollux",
    "background": {
        "service_worker": "background.js"
    },
    "commands": {
        "toggleMultiSelectMode": {
            "description": "__MSG_toggleMultiSelectMode__",
            "suggested_key": {
                "default": "Ctrl+M"
            }
        }
    },
    "content_scripts": [
        {
            "exclude_matches": [
                "https:\/\/www.youtube.com\/error?*",
                "https:\/\/www.youtube.com\/howyoutubeworks\/*",
                "https:\/\/www.youtube.com\/intl\/*",
                "https:\/\/www.youtube.com\/kids\/*",
                "https:\/\/www.youtube.com\/live_chat?*",
                "https:\/\/www.youtube.com\/pop-up-player\/*"
            ],
            "js": [
                "js\/start.js"
            ],
            "matches": [
                "https:\/\/www.youtube.com\/*"
            ],
            "run_at": "document_start"
        },
        {
            "css": [
                "css\/main.css"
            ],
            "exclude_matches": [
                "https:\/\/www.youtube.com\/error?*",
                "https:\/\/www.youtube.com\/howyoutubeworks\/*",
                "https:\/\/www.youtube.com\/intl\/*",
                "https:\/\/www.youtube.com\/kids\/*",
                "https:\/\/www.youtube.com\/live_chat?*",
                "https:\/\/www.youtube.com\/pop-up-player\/*"
            ],
            "js": [
                "js\/content.js"
            ],
            "matches": [
                "https:\/\/www.youtube.com\/*"
            ],
            "run_at": "document_end"
        }
    ],
    "default_locale": "en",
    "description": "__MSG_extensionDescription__",
    "icons": {
        "24": "icons\/24.png",
        "48": "icons\/48.png",
        "96": "icons\/96.png",
        "128": "icons\/128.png"
    },
    "manifest_version": 3,
    "name": "__MSG_extensionName__",
    "options_ui": {
        "open_in_tab": true,
        "page": "options.html"
    },
    "permissions": [
        "storage"
    ],
    "version": "3.7",
    "web_accessible_resources": [
        {
            "resources": [
                "js\/polymer.js"
            ],
            "matches": [
                "https:\/\/www.youtube.com\/*"
            ]
        }
    ]
}