Examine source code of HTTPS Already

{
  "manifest_version": 2,
  "name": "HTTPS Already",
  "short_name": "HTTPS",
  "version": "1.1resigned1",
  "author": "dngb",
  "description": "Converts all HTTP requests to HTTPS. That's it. Requires minimal permissions and can be temporarily disabled by clicking the addon toolbar icon.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "http://*/*"
  ],
  "applications": {
    "gecko": {
      "id": "https@l.ready",
      "strict_min_version": "52.0"
    }
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_action": {
    "default_title": "HTTPS Already",
    "default_icon": "icon.svg"
  },
  "background": {
    "scripts": [
      "convert.js"
    ]
  }
}