Smart pixel rulers

{
    "update_url": "https:\/\/clients2.google.com\/service\/update2\/crx",
    "name": "Smart pixel rulers",
    "description": "Provides an on-screen rulers along with their coordinates on a web page",
    "version": "0.0.2",
    "permissions": [
        "tabs",
        ""
    ],
    "icons": {
        "16": "icons\/16.png",
        "48": "icons\/48.png",
        "128": "icons\/128.png"
    },
    "background": {
        "scripts": [
            "background.js"
        ]
    },
    "browser_action": {
        "default_title": "Smart pixel rulers",
        "default_icon": "icons\/active.png"
    },
    "manifest_version": 2
}