Examine source code of Tiny Block

{
  "manifest_version": 2,
  "name": "Tiny Block",
  "author": "Jadachoa",
  "version": "1.0.0",
  "description": "Website blocker for focus",
  "icons": {
    "32": "assets/images/icon-32.png",
    "48": "assets/images/icon-48.png",
    "96": "assets/images/icon-96.png",
    "128": "assets/images/icon-128.png"
  },
  "browser_action": {
    "default_icon": "assets/images/icon-128.png",
    "default_title": "Tiny Block",
    "default_popup": "popup/popup.html",
    "browser_style": false
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "settings/settings.html",
    "browser_style": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tinyblock@jadachoa.com"
    }
  }
}