Examine source code of Canned Responses by typedesk

{
  "manifest_version": 2,
  "name": "typedesk Canned Responses",
  "homepage_url": "http://www.typedesk.com/",
  "description": "Boost your productivity effortlessly! Automate typing tasks, streamline with canned responses, text snippets, and automation.",
  "default_locale": "en",
  "content_security_policy": "script-src 'self'; object-src 'self'; connect-src *;",
  "permissions": [
    "activeTab",
    "tabs",
    "notifications",
    "https://*/*",
    "http://*/*",
    "storage",
    "contextMenus",
    "scripting",
    "clipboardRead",
    "clipboardWrite"
  ],
  "icons": {
    "16": "icons/16.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "js/content_script.js"
      ],
      "css": []
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "js/inject_text.js"
      ],
      "css": [],
      "all_frames": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_start",
      "match_about_blank": true,
      "js": [
        "js/listeners.js"
      ],
      "css": []
    }
  ],
  "devtools_page": "devtools.html",
  "browser_action": {
    "default_icon": {
      "38": "icons/icon_38_default.png"
    }
  },
  "web_accessible_resources": [
    "logo_icon.svg",
    "Rubik_400.woff2",
    "Rubik_500.woff2"
  ],
  "version": "4.0.0",
  "commands": {
    "open-search": {
      "description": "Open typedesk search.",
      "suggested_key": {
        "default": "Alt+C"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ef00751d-4c17-47fb-bc1d-f1927528f363}"
    }
  }
}