Examine source code of Certificate Trust

{
  "manifest_version": 2,
  "name": "Certificate Trust",
  "version": "1.0.0",
  "author": "devmni",
  "description": "This add-on shows with a colored icon whether the SSL/TLS certificate used by the website for the HTTPS connection is classified as trustworthy (by Mozilla) or only by the local computer, or whether it is only a self-signed or an http connection. It helps, for example, in recognizing (company) proxies, which are also displayed by Firefox with a green lock by default.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "bin/backend.js",
      "bin/constants.js",
      "bin/frontend.js",
      "bin/main.js"
    ]
  },
  "browser_action": {
    "default_title": "CA Watchdog",
    "default_icon": "icons/standby.png"
  },
  "web_accessible_resources": [
    "db/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0195131e-a21d-7f54-90ef-f067811ac4aa}",
      "strict_min_version": "79.0"
    }
  }
}