Examine source code of dont-track-me

{
  "manifest_version": 2,
  "name": "dont-track-me",
  "description": "WebExtension that prevents you from being tracked by Facebook/Twitter when you browse the web.",
  "homepage_url": "https://github.com/t1st3/dont-track-me",
  "version": "0.3.1resigned1",
  "icons": {
    "48": "icons/dont-track-me.svg",
    "96": "icons/dont-track-me.svg"
  },
  "applications": {
    "gecko": {
      "id": "dont-track-me@t1st3.com",
      "strict_min_version": "48.0"
    }
  },
  "background": {
    "scripts": [
      "vendor/browser-polyfill.min.js",
      "dont-track-me.js",
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}