Examine source code of Slideshow

{
  "manifest_version": 2,
  "name": "slideshow",
  "version": "1.1.2resigned1",
  "description": "__MSG_manifest_description__",
  "author": "Olivier Meunier",
  "applications": {
    "gecko": {
      "id": "slideshow-ext@neokraft.net",
      "strict_min_version": "56.0"
    }
  },
  "icons": {
    "96": "icons/icon-96.png"
  },
  "default_locale": "en",
  "background": {
    "scripts": [
      "resources/dist/background.js"
    ]
  },
  "page_action": {
    "browser_style": false,
    "default_icon": "icons/action.svg"
  },
  "permissions": [
    "<all_urls>",
    "activeTab",
    "tabs",
    "webNavigation"
  ]
}