manifest.json

{
  "name": "Temporary Site Blocker",
  "version": "1.0.2",
  "description": "Temporarily blocks sites you specify so you can get some work done.",
  "background_page": "background.html",
  "icons": {
    "48": "img/icon_48.png",
    "128": "img/icon_128.png"
  },
  "browser_action": {
    "default_icon": "img/icon_19.png",
    "default_title": "Temporary Site Blocker",
    "popup": "settings.html"
  },
  "permissions": [
    "tabs"
  ]
}