Examine source code of Toggle View Source

{
  "manifest_version": 2,
  "name": "Toggle View Sources",
  "version": "1.0.0",
  "description": "Toggle 'view-source:' on the current URL to view or revert the page source code.",
  "permissions": [
    "activeTab",
    "contextMenus",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "view-source:(this-url)"
  },
  "icons": {
    "48": "icon.png"
  },
  "author": "Salvatore Noschese",
  "homepage_url": "https://salvatorenoschese.it",
  "browser_specific_settings": {
    "gecko": {
      "id": "view-source@salvatorenoschese.it"
    }
  }
}