Examine source code of BigMama Proxy Connect

{
  "manifest_version": 2,
  "name": "BigMama Proxy Connect",
  "version": "1.2.2",
  "description": "BigMama Proxy Network connect addon",
  "icons": {
    "48": "logo48x48.png"
  },
  "browser_action": {
    "default_icon": "logo48x48.png",
    "default_title": "BigMama Proxy Connect",
    "default_popup": "index.html"
  },
  "permissions": [
    "proxy",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "91.1.0",
      "id": "{22a34c86-59e3-4313-aac3-e3c65a9b1e7d}"
    }
  }
}