Examine source code of Remember the link

{
  "manifest_version": 2,
  "name": "Remember the link",
  "description": "Remember important sites by storing their links on rememberthelink.com",
  "homepage_url": "https://rememberthelink.com",
  "version": "2.0.3resigned1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "page_action": {
    "default_icon": "icons/rememberthelink-32.png",
    "default_title": "Remember"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jid0-IoUbfiSo647IqjVjhk6VB4A6AIE@jetpack"
    }
  }
}