Examine source code of FireShot

{
  "optional_permissions": [
    "tabs",
    "clipboardWrite"
  ],
  "commands": {
    "last-used-action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "__MSG_options_label_last_action_hotkey__"
    },
    "capture-entire-page-action": {
      "suggested_key": {
        "default": "Alt+Shift+1",
        "mac": "Command+Shift+1"
      },
      "description": "__MSG_action_capture_entire_lite__"
    },
    "capture-selection-action": {
      "suggested_key": {
        "default": "Alt+Shift+4",
        "mac": "Command+Shift+6"
      },
      "description": "__MSG_action_capture_selection_lite__"
    },
    "capture-visible-page-action": {
      "suggested_key": {
        "default": "Alt+Shift+3",
        "mac": "Command+Shift+2"
      },
      "description": "__MSG_action_capture_visible_lite__"
    }
  },
  "browser_action": {
    "default_popup": "fsPopup.html",
    "default_title": "FireShot - Capture page",
    "default_icon": "images/sss_48.png",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cf354578-3fc0-4d92-9a22-cb1f455cc22a}"
    }
  },
  "name": "__MSG_application_title__",
  "short_name": "FireShot",
  "icons": {
    "16": "images/sss_16.png",
    "32": "images/sss_32.png",
    "48": "images/sss_48.png",
    "128": "images/sss_128.png"
  },
  "web_accessible_resources": [
    "images/*.gif"
  ],
  "background": {
    "scripts": [
      "scripts/fsXBrowserSupport.js",
      "scripts/fsPreferences.js",
      "scripts/fsUtils.js",
      "scripts/fsCommands.js",
      "scripts/fsSSS.js",
      "scripts/fsNativeAPISupport.js",
      "scripts/fsBackground.js",
      "scripts/fsWASMAPISupport.js",
      "scripts/fsAutomation.js"
    ]
  },
  "options_ui": {
    "page": "fsOptions.html",
    "browser_style": true
  },
  "version": "2.5.3",
  "manifest_version": 2,
  "content_scripts": [
    {
      "matches": [
        "*://getfireshot.com/activate.php?*"
      ],
      "js": [
        "scripts/fsActivation.js"
      ]
    }
  ],
  "default_locale": "en",
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "permissions": [
    "activeTab",
    "<all_urls>",
    "contextMenus",
    "nativeMessaging",
    "downloads",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "description": "Capture any page as a screenshot, crop and annotate with arrows and text, then save or share the image. Full page, visible area, and"
}