Examine source code of RedditArchive

{
  "manifest_version": 2,
  "name": "RedditArchive",
  "version": "1.2",
  "description": "redirects reddit links to archive links",
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*",
        "*://*.archive.org/*"
      ],
      "js": [
        "archive.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{06782b06-af40-44b9-b467-b89c610dd943}"
    }
  }
}