Examine source code of NSC Blocker

{
  "description": "Block unsafe content based on the NSC response header",
  "manifest_version": 2,
  "name": "NSC Blocker",
  "version": "1.2",
  "homepage_url": "https://safe-internet.org/web-extension",
  "icons": {
    "128": "icons/logo.svg"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "settings.js",
      "tab_handler.js",
      "background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/logo_128.png",
    "default_title": "Safe Internet",
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "blocker@safe-internet.org",
      "strict_min_version": "97.0"
    }
  }
}