Measur

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Measur",
  "version": "2.5",
  "manifest_version": 2,
  "icons": {
    "19": "images/greyIcon19.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "description": "Record how far you scroll on Tumblr",
  "browser_action": {
    "default_icon": "images/greyIcon19.png",
    "default_popup": "popup.html"
  },
  "options_page": "options.html",
  "background": {
    "scripts": [
      "backgroundScript.js"
    ],
    "persistent": false
  },
  "permissions": [
    "tabs",
    "storage",
    "*://*.tumblr.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.tumblr.com/*"
      ],
      "js": [
        "injectScript.js"
      ]
    }
  ]
}