manifest.json

 {
    "name": "Task Timer",
    "key":"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoMSc2w8bkII0HLua0HX9aV42xDugQp1tRBxxNM0EvqKKbdJtEIYibGEpgkhhbx1UKochkBdeC3nrEJ9+lso6M7ukeuIr4ywFplXEg62a+UKjP2qZ5JWIIBD8MA2ggCFPFEZvBAemm29W16F3eflM6TJXQZ8rLiRTdeyTgj0QsviP9zlmlffdLRorUp8WK5mITqqmCshICNnOt4+Wn2geFI1jMgdcNb5AbhJKV5e9eAStZ4VJtsp+P/yiPeNCJe7FfV5aO1Gf0t9Ez/3r4e9Ag+7F/VvhzZbNH4iuHGeCQ1hoxFkMXXgnh45CJgzHknJHmnvPrw2zvHBlc4I8Y/9l2wIDAQAB", 
    "oauth2": {
        "client_id": "936014391451-p06hnofi9aa6jojna8apfrv3rkj3mu7t.apps.googleusercontent.com",
        "scopes":["https://www.googleapis.com/auth/spreadsheets"]
    },
    "version": "1.0",
    "description": "Track work time and log in google sheets",
    "permissions": [
        "storage",
        "identity",
        "tabs",
        "https://ssl.gstatic.com/",
        "https://www.googleapis.com/",
        "https://accounts.google.com/"],
    "background": {
      "scripts": ["background.js"],
      "persistent": false
    },
  	"browser_action": {
      	"default_icon": {
        	"16": "images/clock_16.png" 
      	},
      	"default_popup": "popup.html" 
    },
    "icons": {
      "16": "images/clock_16.png",
      "32": "images/clock_32.png",
      "48": "images/clock_48.png",
      "128": "images/clock_128.png"
    },
    "manifest_version": 2
  }