Examine source code of Content Edit & Blur

{
  "manifest_version": 3,
  "name": "Content Edit & Blur",
  "author": "Hasan Abo-Shally",
  "version": "2.4.0",
  "description": "Edit, blur, redact, hide and annotate any webpage. Build mockups, protect sensitive details and capture clean screenshots.",
  "homepage_url": "https://hasanaboshally.github.io/web-content-edit-and-blur--browser-extension/",
  "icons": {
    "128": "images/app-icon-128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "contextMenus"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "context-target.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "action": {
    "default_icon": {
      "19": "images/icons/19x19/icon-idle.png",
      "38": "images/icons/38x38/icon-idle.png"
    },
    "default_title": "Content Edit & Blur"
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+E"
      },
      "description": "Toggle toolbar"
    },
    "toggle-edit-mode": {
      "suggested_key": {
        "default": "Alt+1"
      },
      "description": "Switch to Edit mode"
    },
    "toggle-blur-mode": {
      "suggested_key": {
        "default": "Alt+2"
      },
      "description": "Switch to Blur mode"
    },
    "toggle-hide-mode": {
      "suggested_key": {
        "default": "Alt+3"
      },
      "description": "Switch to Hide mode"
    },
    "toggle-redact-mode": {
      "description": "Switch to Redact mode"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ae036afb-d846-4f79-a308-13c6e8191129}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}