MailTracker: Email tracker for Gmail

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "MailTracker: Email tracker for Gmail",
  "description": "Track if your emails are opened & how many times. Be notified when your emails are read.",
  "version": "2.2.13",
  "homepage_url": "https://app.getmailtracker.com",
  "background": {
    "service_worker": "src/pages/background/index.js",
    "type": "module"
  },
  "action": {
    "default_icon": "icon48.png",
    "default_popup": "src/pages/popup/index.html",
    "default_title": "MailTracker"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://inbox.google.com/*",
        "https://mail.google.com/*",
        "https://mailtracker.hunter.io/messages"
      ],
      "js": [
        "jquery.min.js",
        "src/pages/content/index.js",
        "webcomponents-bundle.js"
      ],
      "css": [
        "assets/css/Style.chunk.css",
        "style.css"
      ]
    }
  ],
  "permissions": [
    "declarativeNetRequest",
    "storage",
    "scripting"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": false,
        "path": "rules.json"
      }
    ],
    "capabilities": [
      "dynamicRuleset"
    ]
  },
  "optional_permissions": [
    "notifications"
  ],
  "host_permissions": [
    "*://mail.google.com/",
    "*://mailtracker.hunter.io/"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "assets/js/*",
        "assets/css/*",
        "icon_gift.png",
        "icon_app_diamond.png",
        "icon_app_activities_free.png",
        "icon_app_activities_paying.png",
        "icon_app_activities_on.png",
        "icon_app_activities_off.png",
        "icon_app_settings_offline.png",
        "icon16.png",
        "icon128.png",
        "icon48.png",
        "mailtracker_icon_error.png",
        "mailtracker_eye.png",
        "mailtracker_eye_slash.png",
        "mailtracker_icon_black.png",
        "mailtracker_icon_green.png",
        "mailtracker_icon_overflow.png",
        "mailtracker_icon_grey.png",
        "mailtracker_eye_red.png",
        "mailtracker_icon_grey-1.png",
        "mailtracker_icon_light_grey.png",
        "mailtracker_icon.png",
        "mailtracker_icon_off.png",
        "sign_mailtracker.gif",
        "compose_app_overflow.png",
        "compose_microphone_error.png",
        "compose_webcam_error.png",
        "compose_follow_up_error.png",
        "compose_microphone_on.png",
        "compose_webcam_on.png",
        "compose_microphone_off.png",
        "compose_webcam_off.png",
        "compose_follow_up_off.png",
        "compose_follow_up_on.png",
        "pageWorld.js",
        "pageWorld.js.map",
        "webcomponents-bundle.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}