Examine source code of KeePassHttp-Connector

{
  "name": "KeePassHttp-Connector",
  "version": "1.0.12resigned1",
  "manifest_version": 2,
  "description": "KeePass integration for browsers using KeePassHttp",
  "icons": {
    "16": "icons/keepass_16x16.png",
    "48": "icons/keepass_48x48.png",
    "128": "icons/keepass_128x128.png"
  },
  "applications": {
    "gecko": {
      "id": "keepasshttp-connector@addons.brandt.tech"
    }
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/19x19/icon_normal_blue_19x19.png",
      "38": "icons/keepass_38x38.png"
    },
    "default_title": "KeePassHttp-Connector",
    "default_popup": "popups/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "background/aes.js",
      "background/cryptoHelpers.js",
      "background/utf8.js",
      "background/utils.js",
      "background/keepass.js",
      "background/httpauth.js",
      "background/browserAction.js",
      "background/page.js",
      "background/event.js",
      "background/init.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "*://*/*.xml",
        "*://*/*.xsd"
      ],
      "js": [
        "browser-polyfill.min.js",
        "jquery-3.2.1.min.js",
        "jquery-ui.min.js",
        "kphc.js"
      ],
      "css": [
        "jquery-ui.min.css",
        "bootstrap-btn.css",
        "kphc.css"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "commands": {
    "fill-username-password": {
      "description": "Insert username + password",
      "suggested_key": {
        "default": "Alt+Shift+U",
        "mac": "Alt+Shift+U"
      }
    },
    "fill-password": {
      "description": "Insert a password",
      "suggested_key": {
        "default": "Alt+Shift+P",
        "mac": "Alt+Shift+P"
      }
    }
  },
  "web_accessible_resources": [
    "jquery.min.map",
    "icons/key_16x16.png",
    "icons/key_24x24.png",
    "images/*"
  ],
  "permissions": [
    "activeTab",
    "contextMenus",
    "clipboardWrite",
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "https://*/*",
    "http://*/*",
    "http://localhost:19455/",
    "http://localhost/",
    "https://raw.github.com/"
  ]
}