Examine source code of MapView Everywhere

{
  "manifest_version": 3,
  "name": "MapView Everywhere",
  "version": "1.1",
  "description": "An extension to display a map view for every website.",
  "icons": {
    "16": "logo-16.png",
    "32": "logo-32.png",
    "48": "logo-48.png",
    "128": "logo-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "logo-16.png",
      "32": "logo-32.png",
      "48": "logo-48.png",
      "128": "logo-128.png"
    }
  },
  "sidebar_action": {
    "default_panel": "popup.html",
    "default_title": "Map View"
  },
  "permissions": [
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "data/all_cities_part_1.json",
        "data/all_cities_part_2.json",
        "data/all_cities_part_3.json",
        "data/all_cities_part_4.json",
        "data/all_cities_part_5.json",
        "data/all_cities_part_6.json",
        "data/all_cities_part_7.json",
        "data/all_cities_part_8.json",
        "data/all_cities_part_9.json",
        "data/all_cities_part_10.json",
        "data/all_cities_part_11.json",
        "data/all_cities_part_12.json",
        "data/all_cities_part_13.json",
        "data/all_cities_part_14.json",
        "data/all_cities_part_15.json",
        "data/all_cities_part_16.json",
        "data/all_cities_part_17.json",
        "data/all_cities_part_18.json",
        "data/all_cities_part_19.json",
        "data/all_cities_part_20.json",
        "*.map"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dccf50ae-d338-4177-aaca-98ffd7c158f6}"
    }
  }
}