manifest.json

{
    "name": "Poke 'Em",
    "description": "This extension keeps track of how much time you spend on websites.",
    "version": "0.2",
    "manifest_version": 2,
    "icons": {
        "48": "./src/images/final48.png",
        "128": "./src/images/final128.png"
    },
    "background": {
        "scripts": [
            "./src/js/background.js"
        ]
    },

    "options_ui":{
        "page": "./src/html/timer.html",
        "open_in_tab": false
    },
    "browser_action": {
        "default_icon": "./src/images/final128.png",
        "default_title": "Poke 'Em!",
        "default_popup": "./src/html/popup.html"
    },
    "permissions": [        "tabs",
    "identity",
    "storage"],
    "content_security_policy": "script-src 'self' https://cdn.firebase.com https://apis.google.com https://www.gstatic.com; object-src 'self'"
}