Examine source code of resumeLater

{
  "manifest_version": 2,
  "name": "resumelater",
  "version": "2.0.2resigned1",
  "description": "__MSG_extensionDescription__",
  "author": "Martin Puppe",
  "homepage_url": "https://github.com/puppe/resumeLater",
  "default_locale": "en",
  "icons": {
    "48": "icons/resumelater-48.png",
    "64": "icons/resumelater-64.png",
    "96": "icons/resumelater-96.png"
  },
  "permissions": [
    "*://*.youtube.com/*",
    "notifications",
    "storage",
    "tabs"
  ],
  "applications": {
    "gecko": {
      "id": "resumeLater@mpuppe.de",
      "strict_min_version": "48.0"
    }
  },
  "background": {
    "page": "/background/background.html"
  },
  "browser_action": {
    "default_title": "__MSG_browser_action_title__",
    "default_icon": {
      "16": "icons/resumelater-16.png",
      "32": "icons/resumelater-32.png",
      "48": "icons/resumelater-48.png",
      "64": "icons/resumelater-64.png",
      "96": "icons/resumelater-96.png"
    }
  },
  "page_action": {
    "default_title": "__MSG_page_action_title__",
    "default_icon": {
      "19": "icons/resumelater-19.png",
      "38": "icons/resumelater-38.png"
    }
  }
}