Jimmy's CSS Injector

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Jimmy's CSS Injector",
  "short name": "css injector",
  "description": "This extension changes css style for a specific page using style injection.",
  "version": "1.10.1",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "page_action": {
    "default_icon": "icons/icon16.png",
    "default_popup": "popup.html",
    "default_title": "PageFontStyle"
  },
  "background": {
    "scripts": [
      "js/helper.js",
      "js/eventPage.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/jquery-3.1.0.min.js",
        "js/helper.js",
        "js/content.js"
      ],
      "css": [
        "css/content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "tabs",
    "contextMenus",
    "tts",
    "storage",
    "webNavigation",
    "*://*/*"
  ]
}