manifest.json

{
  "name": "Labs for Google Plus",
  "version": "1.0.0",
  "description": "Extends Google+ with a couple of neat labs features.",
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "permissions": [
    "tabs",
    "https://plus.google.com/*",
    "https://talkgadget.google.com/*"
   ],
  "options_page": "options.html",
  "background_page": "background.html",
  "content_scripts": [
    {
      "matches": [
        "https://plus.google.com/*"
       ],
      "css": [
        "css/plus.css"
      ],
      "js": [
        "js/base.js",
        "js/labs_enum.js",
        "js/injection_plus.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }, 
    {
      "matches": [
        "https://talkgadget.google.com/talkgadget/*"
       ],
      "css": [
        "css/talk.css"
      ],
      "js": [
        "js/base.js",
        "js/labs_enum.js",
        "js/injection_talk.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }, 
    {
      "matches": [
        "https://talkgadget.google.com/hangouts/*"
       ],
      "css": [
        "css/hangout.css"
      ],
      "js": [
        "js/base.js",
        "js/labs_enum.js",
        "js/injection_hangout.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }, 
    {
      "matches": [
        "https://googlesharedspaces.appspot.com/p/tuna*"
       ],
      "js": [
        "js/base.js",
        "js/labs_enum.js",
        "js/injection_hangout_user.js"
      ],
      "run_at": "document_end",
      "all_frames": true
    }
  ]
}