Examine source code of Webcollect

{
  "name": "Webcollect",
  "short_name": "Webcollect",
  "version": "8.0",
  "description": "Capture webpages and save with Mybase Desktop 7/8",
  "homepage_url": "http://www.wjjsoft.com/webcollect.html",
  "manifest_version": 2,
  "icons": {
    "16": "nyfedit_16x16.png",
    "32": "nyfedit_32x32.png",
    "48": "nyfedit_48x48.png",
    "128": "nyfedit_128x128.png"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "clipboardRead",
    "clipboardWrite",
    "nativeMessaging",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "content_script.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "bg.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "nyfedit_16x16.png",
      "32": "nyfedit_32x32.png",
      "48": "nyfedit_48x48.png",
      "128": "nyfedit_128x128.png"
    },
    "browser_style": true,
    "default_title": "Save with Mybase Desktop 7/8"
  },
  "commands": {
    "copyHtmlImages": {
      "suggested_key": {
        "default": "Alt+Shift+C",
        "mac": "Alt+Shift+C"
      },
      "description": "Copy Html + Images"
    },
    "saveWithMybase": {
      "suggested_key": {
        "default": "Alt+Shift+S",
        "mac": "Alt+Shift+S"
      },
      "description": "Save with Mybase 7/8"
    }
  },
  "applications": {
    "gecko": {
      "id": "webcollect@wjjsoft.com",
      "strict_min_version": "55.0"
    }
  }
}