Examine source code of Censorify

{
  "manifest_version": 2,
  "name": "Censorify",
  "version": "1.0.1",
  "description": "A firefox extension that censors foul words on a webpage",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "./src/bundle.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+K",
        "mac": "Command+Shift+K"
      },
      "description": "Open popup window"
    }
  },
  "browser_action": {
    "default_popup": "./src/popup/popup.html"
  },
  "icons": {
    "16": "./src/assets/icon16.png",
    "32": "./src/assets/icon32.png",
    "48": "./src/assets/icon48.png",
    "64": "./src/assets/icon64.png",
    "128": "./src/assets/icon128.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "incognito": "spanning",
  "content_security_policy": "script-src 'self';",
  "browser_specific_settings": {
    "gecko": {
      "id": "{1a3293a4-ac4e-4e09-b893-d9ee32e8a934}"
    }
  }
}