Examine source code of Intentional Browsing

{
  "manifest_version": 2,
  "name": "Intentional Browsing",
  "version": "0.1.1",
  "description": "Block the feed. Keep the signal. Visit on purpose.",
  "permissions": [
    "storage",
    "webNavigation",
    "webRequest",
    "webRequestBlocking",
    "*://twitter.com/*",
    "*://www.twitter.com/*",
    "*://x.com/*",
    "*://www.x.com/*",
    "*://mobile.twitter.com/*",
    "*://mobile.x.com/*",
    "*://reddit.com/*",
    "*://www.reddit.com/*",
    "*://old.reddit.com/*",
    "*://new.reddit.com/*",
    "*://youtube.com/*",
    "*://www.youtube.com/*",
    "*://m.youtube.com/*",
    "*://instagram.com/*",
    "*://www.instagram.com/*",
    "*://facebook.com/*",
    "*://www.facebook.com/*",
    "*://m.facebook.com/*",
    "*://linkedin.com/*",
    "*://www.linkedin.com/*",
    "*://tiktok.com/*",
    "*://www.tiktok.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "ui/popup.html",
    "default_title": "Intentional Browsing"
  },
  "content_scripts": [
    {
      "matches": [
        "*://twitter.com/*",
        "*://www.twitter.com/*",
        "*://x.com/*",
        "*://www.x.com/*",
        "*://mobile.twitter.com/*",
        "*://mobile.x.com/*"
      ],
      "js": [
        "content/twitter.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://reddit.com/*",
        "*://www.reddit.com/*",
        "*://old.reddit.com/*",
        "*://new.reddit.com/*"
      ],
      "js": [
        "content/reddit.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://youtube.com/*",
        "*://www.youtube.com/*",
        "*://m.youtube.com/*"
      ],
      "js": [
        "content/youtube.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://instagram.com/*",
        "*://www.instagram.com/*"
      ],
      "js": [
        "content/instagram.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://facebook.com/*",
        "*://www.facebook.com/*",
        "*://m.facebook.com/*"
      ],
      "js": [
        "content/facebook.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://linkedin.com/*",
        "*://www.linkedin.com/*"
      ],
      "js": [
        "content/linkedin.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://tiktok.com/*",
        "*://www.tiktok.com/*"
      ],
      "js": [
        "content/tiktok.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "intentional-browsing@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}