Examine source code of Email Masker

{
  "icons": {
    "16": "icon16.plasmo.192fd1f9.png",
    "32": "icon32.plasmo.4d28be0c.png",
    "48": "icon48.plasmo.8337b32e.png",
    "64": "icon64.plasmo.c5fef9ed.png",
    "128": "icon128.plasmo.20a0583f.png"
  },
  "manifest_version": 2,
  "browser_action": {
    "default_icon": {
      "16": "icon16.plasmo.192fd1f9.png",
      "32": "icon32.plasmo.4d28be0c.png",
      "48": "icon48.plasmo.8337b32e.png",
      "64": "icon64.plasmo.c5fef9ed.png",
      "128": "icon128.plasmo.20a0583f.png"
    },
    "default_popup": "popup.html"
  },
  "version": "0.2.0",
  "author": "emailmasker@ehello.maskmy.id",
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://github.com/irazasyed/email-masker",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "generate-email.fa6dbc75.js"
      ],
      "all_frames": true,
      "exclude_matches": [
        "https://*.proton.me/*",
        "https://accounts.google.com/*",
        "https://app.skiff.com/*"
      ],
      "css": []
    }
  ],
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "emailmaskerff@ehello.maskmy.id"
    }
  },
  "web_accessible_resources": [
    "generate-email.98c08c93.svg"
  ]
}