Examine source code of Open With

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "7.2.6",
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "openwith@darktrojan.net",
      "strict_min_version": "63.0"
    }
  },
  "icons": {
    "16": "images/openwith16.png",
    "24": "images/openwith24.png",
    "32": "images/openwith32.png",
    "48": "images/openwith48.png",
    "64": "images/openwith64.png",
    "96": "images/openwith96.png"
  },
  "background": {
    "scripts": [
      "common.js",
      "background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "downloads",
    "nativeMessaging",
    "storage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": {
      "16": "images/openwith16.png",
      "24": "images/openwith24.png",
      "32": "images/openwith32.png",
      "48": "images/openwith48.png",
      "64": "images/openwith64.png",
      "96": "images/openwith96.png"
    },
    "default_popup": "action.html",
    "browser_style": false
  },
  "options_ui": {
    "browser_style": false,
    "open_in_tab": true,
    "page": "options.html"
  },
  "commands": {
    "open_1": {
      "suggested_key": {
        "default": "Alt+Shift+I"
      },
      "description": "Browser shortcut #1"
    },
    "open_2": {
      "suggested_key": {
        "default": "Alt+Shift+O"
      },
      "description": "Browser shortcut #2"
    },
    "open_3": {
      "suggested_key": {
        "default": "Alt+Shift+P"
      },
      "description": "Browser shortcut #3"
    }
  }
}