manifest.json

{
    "name": "Trello Helper",
    "version": "0.2",
    "manifest_version" : 2,
    "description": "Trello Helper adds some much needed functionality to Trello. The current version focuses on exporting card information from lists.",
    "background" : {
        "page" : "background.html",
        "persistent": false
    },
    "page_action" :
    {
        "default_icon": {
            "19": "icons/19.png",
            "38": "icons/38.png"
        }
    },
    "content_scripts": [
        {
            "matches": ["https://trello.com/b/*"],
            "css": ["lib/TrelloHelper/css/exportpopup.css"],
            "js": [
                "lib/jquery-2.1.1.min.js",
                "lib/TrelloHelper/js/exportpopup.js",

                "lib/TrelloUI/trelloui.js",

                "scripts/main.js"
            ],
            "run_at": "document_idle"
        }
    ],
    "permissions": [
        "tabs"
    ],
    "icons": {
        "16": "icons/16.png",
        "48": "icons/48.png",
        "128": "icons/128.png"
    },
    "web_accessible_resources": [
        "settings/index.html"
    ],
    "options_page": "settings/index.html",
    "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"
}