Examine source code of ListenToThis-Highlight

{
  "manifest_version": 2,
  "name": "r/ListenToThis-Highlight",
  "version": "2resigned1",
  "author": "Alex Adam",
  "homepage_url": "https://github.com/alexadam/ListenToThis-Highlight",
  "description": "",
  "options_page": "options.html",
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "48": "icons/logo.png"
  },
  "browser_action": {
    "default_icon": {
      "48": "icons/logo.png"
    },
    "default_title": "r/ListenToThis-Highlight",
    "browser_style": true,
    "default_popup": "action.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "tabs",
    "http://*/*",
    "https://*/*",
    "<all_urls>",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{05377384-8010-4c3a-be8c-53b00e5e1d74}"
    }
  }
}