Examine source code of HTTP alert

{
  "manifest_version": 2,
  "name": "__MSG_name__",
  "version": "1.2.1",
  "description": "__MSG_description__",
  "default_locale": "en",
  "homepage_url": "https://gitlab.com/qlcvea/http-alert#readme",
  "applications": {
    "gecko": {
      "id": "{d35aebe2-0f0f-48e7-bbcb-0b603988b44f}"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*"
  ],
  "options_ui": {
    "page": "options/index.html",
    "browser_style": true,
    "chrome_style": true,
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "web_accessible_resources": [
    "block/index.html",
    "block/script.js",
    "block/style.css"
  ],
  "content_security_policy": "default-src 'self'; script-src 'self'; object-src 'self'; style-src 'self'; img-src 'self' data:; media-src 'self'; frame-src 'self'; font-src 'self'; connect-src 'self' https:"
}