Examine source code of Rite.ly

{
  "manifest_version": 2,
  "name": "Rite.ly",
  "short_name": "Rite.ly : Call To A ction",
  "description": "Shorten links on the fly",
  "version": "0.0.5resigned1",
  "icons": {
    "16": "ritely-extension-shared/img/icon-16.png",
    "48": "ritely-extension-shared/img/icon-48.png",
    "256": "ritely-extension-shared/img/icon-256.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "ritely-extension-shared/img/icon-19.png",
      "38": "ritely-extension-shared/img/icon-76.png"
    },
    "default_popup": "native/main.html",
    "default_title": "Rite.ly"
  },
  "background": {
    "page": "native/background.html",
    "persistent": true
  },
  "options_ui": {
    "page": "native/options.html",
    "chrome_style": true
  },
  "externally_connectable": {
    "matches": [
      "https://*.ritetag.com/*",
      "https://*.rite.ly/*",
      "https://*.twitter.com/*",
      "https://buffer.com/*",
      "https://code.jquery.com/*",
      "https://1487482361.rsc.cdn77.org/*"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*",
    "contextMenus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{965ff287-b371-4d6a-9482-13908b18fc61}"
    }
  }
}