Examine source code of ffprofanity

{
  "manifest_version": 3,
  "name": "Profanity Filter",
  "version": "1.3.0",
  "description": "Mute profanity and display censored subtitles while watching videos. All processing is done locally to protect your privacy.",
  "author": "ffprofanity",
  "homepage_url": "https://github.com/lggcs/ffprofanity",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "activeTab",
    "webNavigation",
    "webRequest",
    "declarativeNetRequest",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "page-scripts/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png"
    },
    "default_title": "Profanity Filter"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false,
    "browser_style": false
  },
  "commands": {
    "_execute_action": {
      "description": "Open popup"
    },
    "move-left": {
      "description": "Decrease subtitle offset (earlier)"
    },
    "move-right": {
      "description": "Increase subtitle offset (later)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ffprofanity@example.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {}
  }
}