Examine source code of Screen Saver / Economisateur d'écran

{
  "name": "Screen saver",
  "manifest_version": 2,
  "description": "Screen saver in WebExtensions offers three different animations inspired by the demoscene, one of which you can customize from the settings screen",
  "version": "0.96resigned1",
  "author": "Christophe Villeneuve",
  "icons": {
    "48": "icons/screen-48.png",
    "96": "icons/screen-96.png",
    "128": "icons/screen-128.png"
  },
  "homepage_url": "https://github.com/hellosct1/screensaver-webextensions",
  "background": {
    "scripts": [
      "background/loader.js",
      "background/loader_anim.js"
    ]
  },
  "browser_action": {
    "default_title": "SCREEN SAVER",
    "default_icon": "icons/icon.png"
  },
  "page_action": {
    "default_title": "Screen Saver Settings",
    "default_icon": "icons/icon2.png",
    "default_popup": "page/popup.html",
    "browser_style": true
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": true
  },
  "web_accessible_resources": [
    "resources/*"
  ],
  "permissions": [
    "activeTab",
    "alarms",
    "tabs",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3d38b4f5-0f42-4834-9c24-07eb383643fc}"
    }
  }
}