Examine source code of Open Bookmarks Slowly

{
  "applications": {
    "gecko": {
      "id": "openslowly@ns.petersimonyi.ca",
      "strict_min_version": "64.0"
    }
  },
  "author": "Peter Simonyi",
  "background": {
    "page": "background.html"
  },
  "description": "Open All in Tabs, just not all at once.",
  "homepage_url": "https://github.com/psimonyi/openslowly",
  "icons": {
    "16": "icon16.svg",
    "24": "icon24.svg",
    "64": "icon.svg"
  },
  "manifest_version": 2,
  "name": "Open Bookmarks Slowly",
  "options_ui": {
    "browser_style": false,
    "page": "options.html"
  },
  "optional_permissions": [
    "notifications"
  ],
  "permissions": [
    "bookmarks",
    "menus",
    "storage",
    "tabs",
    "webNavigation"
  ],
  "version": "4"
}