manifest.json

{
  "name": "View Google Docs Gridlines",
  "short_name": "Google Docs Gridlines",
  "version": "0.3",
  "description": "View invisible table outlines as gridlines",
  "manifest_version": 2,
  "background": {
    "scripts": ["background.js"]
  },
  "content_scripts": [
    {
      "matches": ["https://docs.google.com/document/*"],
      "js": ["content.js"],
      "css": ["override.css"],
      "run_at": "document_end"
    },
    {
      "matches": ["https://docs.google.com/document/*"],
      "js": ["preload.js"],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "128": "icon/chrome-web-store-icon.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icon/icon-activated-16.png",
      "24": "icon/icon-activated-24.png",
      "32": "icon/icon-activated-32.png"
    },
    "default_title": "View Google Docs Gridlines",
    "default_popup": "popup.html"
  },
  "permissions": ["tabs", "storage", "https://docs.google.com/document/*"]
}