Examine source code of Reload as https

{
  "description": "Adds a page action button for http pages to reload as https",
  "author": "MrOtherGuy",
  "version": "0.0.3resigned1",
  "manifest_version": 2,
  "name": "Reload as https",
  "page_action": {
    "show_matches": [
      "http://*/*"
    ],
    "browser_style": true,
    "default_icon": {
      "16": "icons/button-icon-dark.svg",
      "32": "icons/button-icon-dark.svg"
    },
    "default_title": "Reload as https://"
  },
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4949dac0-83ef-4b57-a050-73bdb7b32897}"
    }
  }
}