UK ↔ US Spelling Highlighter

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "manifest_version": 3,
    "name": "UK \u2194 US Spelling Highlighter",
    "version": "1.0.1",
    "description": "Highlight UK or US spelling variations on any webpage",
    "permissions": [
        "activeTab",
        "scripting"
    ],
    "host_permissions": [
        "<all_urls>"
    ],
    "action": {
        "default_popup": "popup.html",
        "default_icon": {
            "16": "icons\/icon-16.png",
            "48": "icons\/icon-48.png",
            "128": "icons\/icon-128.png"
        }
    },
    "icons": {
        "16": "icons\/icon-16.png",
        "48": "icons\/icon-48.png",
        "128": "icons\/icon-128.png"
    }
}