Breathe: Website blocker

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Breathe: Website blocker",
  "description": "Calm and simple reminders to breathe, whenever you visit a distracting site.",
  "version": "0.2",
  "icons": {
    "128": "breathe.png"
  },
  "browser_action": {
    "default_icon": "breathe.png",
    "default_title": "Breathe",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "breathe.html"
  ]
}