Examine source code of Malarkey Blocker

{
  "manifest_version": 2,
  "name": "Malarkey Blocker",
  "version": "0.2",
  "description": "Malarkey Blocker helps you browse the web hassle-free by blocking annoying distractions, fake news, and unnecessary clutter—so you get the real content without the noise",
  "icons": {
    "36": "icons/baseline_close_black_48dp.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "css": [
        "hide_elements.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.instagram.com/*"
      ],
      "js": [
        "annoyanceblocker.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca7cefa9-4b4d-4dc1-8a54-5219ec5d3685}"
    }
  }
}