manifest.json

{
    "manifest_version": 2,
    "name": "Local Masto Redirect",
    "version": "1.1",
    "description": "Adds a button that will redirect you to your local masto-instance version of this post.",
    "icons": {
        "64": "icons/fediverse_64.png"
    },
    "content_scripts": [
        {
            "matches": [
                "*://*/@*/*",
                "*://*/notes/*",
                "*://*/notice/*"
            ],
            "js": [
                "inject.js"
            ]
        }
    ],
    "options_ui": {
        "page": "options.html"
    },
    "background": {
        "scripts": [
            "background.js"
        ]
    },
    "page_action": {
        "default_icon": "icons/fediverse_64.png",
        "default_title": "Open in local mastodon instance!"
    },
    "permissions": [
        "activeTab",
        "storage",
        "<all_urls>"
    ],
    "browser_specific_settings": {
        "gecko": {
            "id": "localmastoredirect@teascade.net"
        }
    }
}