Examine source code of TheCoordinator

{
  "manifest_version": 2,
  "name": "TheCoordinator",
  "description": "Grabs coordinates from web pages",
  "version": "0.1",
  "homepage_url": "https://github.com/activityworkshop/TheCoordinator",
  "icons": {
    "48": "icons/wpt-48.png",
    "96": "icons/wpt-96.png"
  },
  "browser_action": {
    "default_icon": "icons/wpt-96.png",
    "default_title": "TheCoordinator",
    "default_popup": "popup/popup.html"
  },
  "permissions": [
    "activeTab"
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+W"
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_scripts/manage_waypoints.js"
      ]
    }
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{ea21ea0c-9265-4577-a26a-abceff2d3239}"
    }
  }
}