Examine source code of JunkBlock

{
  "manifest_version": 2,
  "name": "JunkBlock",
  "version": "1.0.2",
  "description": "Block distracting websites and content to stay focused",
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "src/utils/logger.js",
      "src/utils/analytics.js",
      "src/background/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*.youtube.com/*",
        "https://*.youtube.com/*",
        "http://*.reddit.com/*",
        "https://*.reddit.com/*",
        "http://*.twitter.com/*",
        "https://*.twitter.com/*",
        "http://*.x.com/*",
        "https://*.x.com/*",
        "http://*.instagram.com/*",
        "https://*.instagram.com/*"
      ],
      "js": [
        "src/utils/filters.data.js",
        "src/utils/filters.js",
        "src/content/common.js",
        "src/content/content-filter.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "src/blocked/blocked.html",
    "src/blocked/blocked.js",
    "src/utils/filters.module.js",
    "src/utils/filters.data.js",
    "src/utils/filters.json"
  ],
  "browser_action": {
    "default_popup": "src/popup/popup.html",
    "default_icon": "assets/icons/icon48.png"
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "assets/icons/icon16.png",
    "48": "assets/icons/icon48.png",
    "128": "assets/icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "junkblock@example.com",
      "strict_min_version": "79.0"
    }
  }
}