Examine source code of QuickCut

{
  "manifest_version": 2,
  "name": "QuickCut",
  "version": "2.6",
  "homepage_url": "https://gitlab.com/claderoki/QuickCut.git/",
  "icons": {
    "48": "icons/QuickSave48x48.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "browser_style": false,
    "open_in_tab": false
  },
  "browser_action": {
    "default_icon": "icons/QuickSave48x48.png",
    "default_title": "QuickCut"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+Shift+P"
      }
    }
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "downloads",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6c593866-3790-4c8e-8a38-7d06ea71b960}"
    }
  }
}