Examine source code of Search Reddit MIST

{
  "manifest_version": 2,
  "name": "Search Reddit MIST",
  "version": "1.5",
  "description": "Simplify appending 'site:reddit.com' to search queries.",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "contextMenus",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content-styles.css"
      ]
    }
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    },
    "default_title": "Search Reddit MIST",
    "default_popup": "popup.html"
  },
  "commands": {
    "toggle-search-bar": {
      "suggested_key": {
        "default": "Ctrl+Shift+F",
        "mac": "Command+Shift+F"
      },
      "description": "Toggle the floating search bar"
    }
  },
  "applications": {
    "gecko": {
      "id": "searchredditmist@yourdomain.com"
    }
  }
}