Examine source code of PopUpOFF

{
  "name": "PopUpOFF - Popup and overlay blocker",
  "short_name": "PopUpOFF",
  "version": "2.1.3",
  "description": "Removes and prevents popups, overlays and cookie notifications, other tools do not. Enjoy the original look of the internet.",
  "permissions": [
    "activeTab",
    "storage",
    "tabs",
    "http://*/",
    "https://*/",
    "contextMenus"
  ],
  "optional_permissions": [
    "downloads"
  ],
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "content_scripts": [
    {
      "js": [
        "content/helpers.js",
        "content/modes.js",
        "content/setup.js"
      ],
      "css": [
        "css/content.css"
      ],
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "background": {
    "page": "background/background.html",
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_title": "PopUpOFF - Click to open",
    "default_icon": {
      "16": "images/logo16.png",
      "32": "images/logo32.png",
      "48": "images/logo48.png",
      "128": "images/logo128.png"
    }
  },
  "icons": {
    "16": "images/logo16.png",
    "32": "images/logo32.png",
    "48": "images/logo48.png",
    "128": "images/logo128.png"
  },
  "web_accessible_resources": [
    "images/stop_ads.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{154cddeb-4c8b-4627-a478-c7e5b427ffdf}"
    }
  },
  "manifest_version": 2
}