Examine source code of FilterTube

{
  "manifest_version": 3,
  "name": "FilterTube",
  "description": "Restore peace of mind to your digital video experience.",
  "version": "3.3.5",
  "background": {
    "scripts": [
      "js/shared/identity.js",
      "js/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "filtertube@devanshvarshney.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_popup": "html/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "tabs",
    "downloads"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.youtube.com/*",
        "*://*.youtubekids.com/*"
      ],
      "js": [
        "js/shared/identity.js",
        "js/content/dom_state.js",
        "js/content/menu.js",
        "js/content/dom_helpers.js",
        "js/content/dom_extractors.js",
        "js/content/dom_fallback.js",
        "js/content/block_channel.js",
        "js/content/bridge_injection.js",
        "js/content/bridge_settings.js",
        "js/content/handle_resolver.js",
        "js/content/collab_dialog.js",
        "js/content/release_notes_prompt.js",
        "js/content/first_run_prompt.js",
        "js/content_bridge.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "js/injector.js",
        "js/filter_logic.js",
        "js/seed.js",
        "js/shared/identity.js",
        "assets/images/homepage_hero_day.mp4",
        "icons/file.svg"
      ],
      "matches": [
        "*://*.youtube.com/*",
        "*://*.youtubekids.com/*"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "host_permissions": [
    "*://*.youtube.com/*",
    "*://*.youtube-nocookie.com/*",
    "*://*.youtubekids.com/*"
  ],
  "optional_host_permissions": [
    "http://*/*",
    "https://*/*"
  ]
}