injections/manifest.json

{
    "manifest_version": 2,
    "name": "injections",
    "version": "0.2",

    "description": "misc CSS injections.",

    "content_scripts": [{
        "matches": ["*://news.ycombinator.com/*"],
        "css": ["styles/news.ycombinator.com.css"]
    }],

    "browser_specific_settings": {
        "gecko": {
            "update_url": "https://raw.githubusercontent.com/italicsjenga/injections/master/updates.json"
        }
    }
}