Examine source code of sslspeedy

{
  "manifest_version": 2,
  "name": "sslspeedy",
  "description": "secure and speed up your web connections.",
  "version": "2.8.5",
  "options_page": "settings.html",
  "permissions": [
    "proxy",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "http://*.678in.com/*",
    "activeTab"
  ],
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": "script-src 'self' https://678in.com ; object-src 'self' ",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_background": "background.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@vpnso.com",
      "strict_min_version": "91.1.0"
    }
  }
}