Examine source code of Proxyme

{
  "name": "proxyme",
  "description": "Proxyme plugin",
  "version": "1.0.0",
  "manifest_version": 2,
  "icons": {
    "48": "icons/icon_48.png",
    "128": "icons/icon_128.png"
  },
  "browser_action": {
    "default_title": "proxyme",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "proxy",
    "http://*/",
    "https://*/",
    "webRequest",
    "<all_urls>",
    "*://developer.mozilla.org/*"
  ],
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"
}