Examine source code of EmojiClip

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.2.5.6",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "author": "EmojiClip Team",
  "homepage_url": "https://emojiclip.com",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "permissions": [
    "clipboardWrite",
    "storage"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "web_accessible_resources": [
    "data/emojis.json",
    "js/worker.js",
    "js/fuse.min.js"
  ],
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+E",
        "mac": "Command+Shift+E"
      },
      "description": "__MSG_shortcutDescription__"
    }
  },
  "applications": {
    "gecko": {
      "id": "emojiclip@extension.local",
      "strict_min_version": "58.0"
    }
  }
}