Examine source code of Reddit Exporter

{
  "manifest_version": 3,
  "name": "Reddit Exporter",
  "description": "Export your Reddit saved posts, upvoted posts, comments and more",
  "version": "0.0.13",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "notifications",
    "alarms",
    "idle"
  ],
  "host_permissions": [
    "https://www.reddit.com/*",
    "https://old.reddit.com/*",
    "https://i.redd.it/*",
    "https://preview.redd.it/*",
    "https://external-preview.redd.it/*",
    "https://v.redd.it/*",
    "https://matrix.redditspace.com/*",
    "https://store.rxliuli.com/*"
  ],
  "author": "rxliuli",
  "action": {
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png",
      "48": "icon/48.png",
      "96": "icon/96.png",
      "128": "icon/128.png"
    }
  },
  "homepage_url": "https://store.rxliuli.com/extensions/reddit-exporter/",
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-exporter@rxliuli.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  }
}