manifest.json

{
  "name": "Todoist Gmail Sidebar",
	"manifest_version": 2,
	"description": "Toggle a Todoist sidebar on the gmail tabs when the page action is clicked",
	"version": "0.9",
	"homepage_url": "http://turkeyphant.org",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [ "tabs",
    "https://*/*","http://*/*","activeTab"
  ],
  "background":{
    "persistent":true,
    "scripts": ["background.js"]
  },
  "browser_action": {
    "default_icon": "icon128.png",
     "default_title": "Toggle Todoist sidebar"
  },
    "content_scripts": [
        {
          "js": [
        "jquery.min.js",
        "jquery.easing.1.3.js",
        "contentscript.js"
            ],
            "matches": [
        "*://mail.google.com/*"
        //"http://*/*",
        //"https://*/*"    
            ],
            "run_at": "document_end"
        }
    ],
    "web_accessible_resources": [
        "frame.html",
        "toggleSidebar.js"
    ]
}